Commit Graph

109031 Commits

Author SHA1 Message Date
Nathan Fontenot 2222ce0fbb powerpc/pseries: Fix possible leaked device node reference
Failure return from dlpar_configure_connector when dlpar adding cpus
results in leaking references to the cpus parent device node. Move the
call to of_node_put() prior to checking the result of
dlpar_configure_connector.

Fixes: 8d5ff32076 ("powerpc/pseries: Make dlpar_configure_connector parent node aware")

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-05-11 16:58:20 +10:00
Krzysztof Kozlowski 202648a607 powerpc: Constify irq_domain_ops
The irq_domain_ops are not modified by the driver and the irqdomain core
code accepts pointer to a const data.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-05-11 16:58:20 +10:00
Linus Torvalds 41f2a93cc6 Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "A set of ARM fixes:

   - fix an off-by-one error in the iommu DMA ops, which caused errors
     with a 4GiB size.

   - remove comments mentioning the non-existent CONFIG_CPU_ARM1020_CPU_IDLE
     macro.

   - remove useless CONFIG_CPU_ICACHE_STREAMING_DISABLE blocks, where
     this symbol never appeared in any Kconfig.

   - fix Feroceon code to cope with a previous change correctly (it
     incorrectly left an additional word in an assembly structure
     definition)

   - avoid a misleading IRQ affinity warning in the ARM PMU code for
     IRQs which are already affine to their CPUs.

   - fix the node name printed in the IRQ affinity warning"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8352/1: perf: Fix the pmu node name in warning message
  ARM: 8351/1: perf: don't warn about missing interrupt-affinity property for PPIs
  ARM: 8350/1: proc-feroceon: Fix feroceon_proc_info macro
  ARM: 8349/1: arch/arm/mm/proc-arm925.S: remove dead #ifdef block
  ARM: 8348/1: remove comments on CPU_ARM1020_CPU_IDLE
  ARM: 8347/1: dma-mapping: fix off-by-one check in arm_setup_iommu_dma_ops
2015-05-10 11:16:48 -07:00
Linus Torvalds 8425ac7a0d Samsung fixes for v4.1
- fixes commit ea08de16eb ("ARM: dts: Add DISP1 power
   domain for exynos5420") which causes 'unhandled fault:
   imprecise external abort' error when PD turned off.
   : make DP a consumer of DISP1 power domain
 
 - fixes 's3c-rtc' probe failure on Odriod-X2/U2/U3 boards.
   : add 'rtc_src' clock to rtc node for source clock of rtc
 
 - fixes typo for 'cpu-crit-0' trip point on exynos5420/5440
 
 - fixes S2R failure on exynos5250-snow due to card power of
   Marvell WiFi driver (suspend/resume)
   : add keep-power-in-susped to WiFi SDIO node
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJVT23xAAoJEA0Cl+kVi2xqZIcP/0CAA25uvidVXdNVYlJbSvr3
 4kesNDG/LGrVnv6xt132iJsXtIfWQxG6nJkhE1x5G9zSgsAjtQWcsCr068Itktsg
 CG1yl/8z6TB+wS0PhTXaa985V62euTws89YGJau6YCZVSXKKcGDjM5e2RJn80yOL
 IMipw8x5xTt0GsIKtC2AyewcNq05SSNtwvYe8CPJ9wGFQPy3gZ1t5WqSwW2mMG+K
 C6mibaN7gs9+sS2ncHglZtHKAR2VxJTNCkq/LOCYlDSftT01GhmhG1fl/tUxEqUD
 1bFTTajA21CNnEvWCdkFkMHkEy7lzW8WCX3tAwDHGON/NdWERV4FSaLTqR0o1ekO
 vLeUSvgtRntBtUY3ojvyfoYq4vrdQF1uoL2r932iO9FILUBpwRYAyG152VFJyZRx
 Hx50yCgyljG3X8xUp5VgiuNwDCgatiFBCeb3YT0qrB9YbnLXqqAUAfMSng8a15dc
 rbD02YsYvYcJPf7RDnS9QQV+ZSSmZIkY7JmxkJ/UJ0SA7dAJBtKrXQyliLVlExHu
 Cz0ye5NHjC+jxwPU/OEFRSZi8bKJXe/q6bAXDRA0vkZWd0G6C+wOq8bnzSWkRM+D
 +/uzxajdDbfs7mr2mPFyc3H22MiwWSOFIRVsCXVKqTN0yVvlaLvHtolUayAD3RrR
 oo25jYh9CYGZhxd+7TVb
 =YBxq
 -----END PGP SIGNATURE-----

Merge tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung

Pull samsung fixes from Kukjin Kim:
 "Here is Samsung fixes for v4.1.  Since I've missed to send this via
  arm-soc tree before v4.1-rc3, so I'm sending this to you directly

   - fix commit ea08de16eb ("ARM: dts: Add DISP1 power domain for
     exynos5420") which causes 'unhandled fault: imprecise external
     abort' error when PD turned off.  ("make DP a consumer of DISP1
     power domain")

   - fix 's3c-rtc' probe failure on Odriod-X2/U2/U3 boards ("add
     'rtc_src' clock to rtc node for source clock of rtc")

   - fix typo for 'cpu-crit-0' trip point on exynos5420/5440

   - fix S2R failure on exynos5250-snow due to card power of Marvell
     WiFi driver (suspend/resume) ("add keep-power-in-susped to WiFi
     SDIO node")"

* tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow
  ARM: dts: Fix typo in trip point temperature for exynos5420/5440
  ARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards
  ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420
2015-05-10 11:13:19 -07:00
Linus Torvalds 8f59ae0643 ARM: SoC fixes for 4.1-rc2
A few patches have come up since the merge window. The largest one is a
 rewrite of the PXA lubbock/mainstone IRQ handling. This was already
 broken in 2011 by a change to the GPIO code and only noticed now.
 
 The other changes contained here are:
 
 MAINTAINERS file updates:
 - Ray Jui and Scott Branden are now co-maintainers for some of the
   mach-bcm chips, while Christian Daudt and Marc Carino have stepped
   down.
 - Andrew Victor is no longer maintaining at91. Instead, Alexandre
   Belloni now becomes an official maintainer, after having done a
   bulk of the work for a while.
 - Baruch Siach, who added the mach-digicolor platform in 4.1
   is now listed as maintainer
 - The git URL for mach-socfpga has changed
 
 Bug fixes:
 - Three bug fixes for new rockchip rk3288 code
 - A regression fix to make SD card support work on certain ux500
   boards
 - multiple smaller dts fixes for imx, omap, mvebu, and shmobile
 - a regression fiix for omap3 power consumption
 - a fix for regression in the ARM CCI bus driver
 
 Configuration changes:
 - more imx platforms are now enabled in multi_v7_defconfig
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIVAwUAVU5vsWCrR//JCVInAQK5Zw/9GMFUQcLfwqfUitabRvA+FjbEYyeKHW2Y
 BCm5OJSOH2MB4/suvmYggIESncHGCzw2iZZwFJ3seuO7vyFAg2pLOmpm2VBvIfqP
 JgokZOhfHDTujogpakNn8ByKszxb/XkuzuDF3AS2BX4H25Rhp7jX6EgrubK9zDcH
 wYsaAXSwc8uUe2885cOK8qYoBhkPRsMqUa4HHp4Z51QNwa+koV9xMFlNyy/j8N8F
 xKjfAW5LCeEdviOjFlYb0Bb3JIerIKmosjHx55g6XCEB1TUKAN6TmqXRUU89dj/0
 MQoD5pXCI1RaV8qjpAFqwcFmfnsAzRob9n1WWEgqwCiKdIDX7E98WeJNGrQ6SlSA
 xePcS+1MMNkTi20CdTSHPwVg5CFz7VG9YTMDrvGtz9tuGtCBQHGhA5o8eQ6eXDYz
 cEMc781Ax4M4Uc3OKb+9M9OAnB+RyJmizjzgR7cQHaQfzI7hVgRAxywu9Z0j4HKJ
 4OmtcOAfwZyEKms9AzvbozKWROVY+T9rC7Aup6SlOSaxupqCdvrMb2XffrixmuVz
 B9vox64BT0Ot0/jqTsZs5YR3UDlX7v1UTx8+BIta7zDvPXIFUSU+dNcS4BDsOkDa
 8Knhi4BpydNaKCxMb8/Q7BjzxNsaMcCEUvNfrjOH7LMHmQhygiKmOSOj3fxEM9S5
 xMSWzw3U0yU=
 =lVQn
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "A few patches have come up since the merge window.  The largest one is
  a rewrite of the PXA lubbock/mainstone IRQ handling.  This was already
  broken in 2011 by a change to the GPIO code and only noticed now.

  The other changes contained here are:

  MAINTAINERS file updates:

   - Ray Jui and Scott Branden are now co-maintainers for some of the
     mach-bcm chips, while Christian Daudt and Marc Carino have stepped
     down.

   - Andrew Victor is no longer maintaining at91.  Instead, Alexandre
     Belloni now becomes an official maintainer, after having done a
     bulk of the work for a while.

   - Baruch Siach, who added the mach-digicolor platform in 4.1 is now
     listed as maintainer

   - The git URL for mach-socfpga has changed

  Bug fixes:

   - Three bug fixes for new rockchip rk3288 code

   - A regression fix to make SD card support work on certain ux500
     boards

   - multiple smaller dts fixes for imx, omap, mvebu, and shmobile

   - a regression fiix for omap3 power consumption

   - a fix for regression in the ARM CCI bus driver

  Configuration changes:

   - more imx platforms are now enabled in multi_v7_defconfig"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
  MAINTAINERS: add Conexant Digicolor machines entry
  MAINTAINERS: socfpga: update the git repo for SoCFPGA
  ARM: multi_v7_defconfig: Select more FSL SoCs
  MAINTAINERS: replace an AT91 maintainer
  drivers: CCI: fix used_mask init in validate_group()
  bus: omap_l3_noc: Fix master id address decoding for OMAP5
  bus: omap_l3_noc: Fix offset for DRA7 CLK1_HOST_CLK1_2 instance
  ARM: dts: dra7: Fix efuse register size for ABB
  ARM: dts: am57xx-beagle-x15: Switch GPIO fan number
  ARM: dts: am57xx-beagle-x15: Switch UART mux pins
  ARM: dts: am437x-sk: reduce col-scan-delay-us
  ARM: dts: am437x-sk: fix for new newhaven display module revision
  ARM: dts: am57xx-beagle-x15: Fix RTC aliases
  ARM: dts: am57xx-beagle-x15: Fix IRQ type for mcp7941x
  ARM: dts: omap3: Add #iommu-cells to isp and iva iommu
  ARM: omap2plus_defconfig: Enable EXTCON_USB_GPIO
  ARM: dts: OMAP3-N900: Add microphone bias voltages
  ARM: OMAP2+: Fix omap off idle power consumption creeping up
  MAINTAINERS: Update brcmstb entry
  MAINTAINERS: Remove Christian Daudt for mach-bcm
  ...
2015-05-09 16:13:38 -07:00
Rusty Russell 1a9f064f51 m32r: make flush_cpumask non-volatile.
We cast away the volatile, but really, why make it volatile at all?
We already do a mb() inside the cpumask_empty() loop.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-05-09 11:09:29 -07:00
Javier Martinez Canillas 8cf5e6dc8d ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow
The Marvell mwifiex driver prevents the system to enter into a suspend
state if the card power is not preserved during a suspend/resume cycle.

So Suspend-to-RAM and Suspend-to-idle are failing on Exynos5250 Snow.

Add the keep-power-in-suspend Power Management property to the SDIO/MMC
node so the mwifiex suspend handler doesn't fail and the system is able
to enter into a suspend state.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-05-09 03:15:16 +09:00
Abhilash Kesavan cb0f7c8b40 ARM: dts: Fix typo in trip point temperature for exynos5420/5440
Remove the extra zero in the "cpu-crit-0" trip point for exynos5420
and exynos5440.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-05-09 03:11:21 +09:00
Markus Reichl ee2020a4ca ARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards
The Exynos4412 SoC has a s3c6410 RTC where the source clock
is now a mandatory property.
This patch fixes probe failure of s3c-rtc on Odroid-X2/U2/U3 boards.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Tested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-05-09 03:06:02 +09:00
Javier Martinez Canillas 0d74776296 ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420
Commit ea08de16eb ("ARM: dts: Add DISP1 power domain for exynos5420")
added a device node for the Exynos5420 DISP1 power domain but dit not
make the DP controller a consumer of that power domain.

This causes an "Unhandled fault: imprecise external abort" error if the
exynos-dp driver tries to access the DP controller registers and the PD
was turned off. This lead to a kernel panic and a complete system hang.

Make the DP controller device node a consumer of the DISP1 power domain
to ensure that the PD is turned on when the exynos-dp driver is probed.

Fixes: ea08de16eb ("ARM: dts: Add DISP1 power domain for exynos5420")
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-05-09 02:33:42 +09:00
Linus Torvalds 3e0283a53f Power management and ACPI fixes for v4.1-rc3
- Fix for a PCI resources management regression introduced during
    the 4.0 cycle and related to the handling of ACPI resources'
    Producer/Consumer flags that turn out to be useless (Jiang Liu).
 
  - Fix for a MacBook regression related to the Smart Battery Subsystem
    (SBS) driver causing various problems (stalls on boot, failure to
    detect or report battery) to happen and introduced during the 3.18
    cycle (Chris Bainbridge).
 
  - Fix for an ACPI/PNP device enumeration regression introduced during
    the 3.16 cycle caused by failing to include two PNP device IDs into
    the list of IDs that PNP device objects need to be created for
    (Witold Szczeponik).
 
  - Fixes for two minor mistakes in the ACPI GPIO properties
    documentation (Antonio Ospite, Rafael J Wysocki).
 
 /
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABCAAGBQJVS8ZQAAoJEILEb/54YlRx38QP/1dtmb1eVZZMP+InQ9COisHp
 qYuBRt8FCWCIyd1PZeRXmLVo8UM337mka2pyUpa+hFJoY+TpVku/8WW18ucjI1TU
 sbJSycYoCiATdHpk2qXV9h6SmCq0e0tEePJx90fA9xYXGTGYs1VEhoBLQ6ayuqnF
 gCiWy1wl3OmFEDDIpykW3pSXJf+8y3LcCqqDGdsL3yqNOXKszmzQJn98F5mxnpp6
 XDG9nBdoC17KxRcvO6vzVikFPNu0FAuPO1JO/vzmKyl4fRbxj7ZTGenzwwV+72aH
 i20SS4sIWTLtpxOj0vtDFaJzqdeAl1tZxNJ+06mJoEcJ67l9PpiE/mqWa9qMYLop
 eDz2dDZES7zLgpDT6sY3ofcAVq59SWrEyWvKiiRWtYe5+LAGZrw6RxgV0ZR1QJTy
 UFPvlYVLhIrPnbywl0pLReQU7DM+199v7RzHSABCa/X2ZOI1/W6streM4zRn4y9U
 JlRLnoW0GAFyO9muRGTesnR8J2+umQvdWbaiIkJ4i8H8KmkM4XTtPNruDfykScE5
 9b5NuxR8QyLrBVqz8dqVO9SkeXvbmnoxYKNCZeCWo6bq46Miyx2W+lAZhpnQTAFD
 jlwb+PpDjMu0R2ERmzhJD6lLNlxSjAUJCJP3nAfjPKoIRlSp9+5KrqLS5MeyQbZz
 b/zdMfGlP1CcfyU3Gn4M
 =JFUn
 -----END PGP SIGNATURE-----

Merge tag 'pm+acpi-4.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "These include three regression fixes (PCI resources management,
  ACPI/PNP device enumeration, ACPI SBS on MacBook) and two ACPI
  documentation fixes related to GPIO.

  Specifics:

   - Fix for a PCI resources management regression introduced during the
     4.0 cycle and related to the handling of ACPI resources'
     Producer/Consumer flags that turn out to be useless (Jiang Liu)

   - Fix for a MacBook regression related to the Smart Battery Subsystem
     (SBS) driver causing various problems (stalls on boot, failure to
     detect or report battery) to happen and introduced during the 3.18
     cycle (Chris Bainbridge)

   - Fix for an ACPI/PNP device enumeration regression introduced during
     the 3.16 cycle caused by failing to include two PNP device IDs into
     the list of IDs that PNP device objects need to be created for
     (Witold Szczeponik)

   - Fixes for two minor mistakes in the ACPI GPIO properties
     documentation (Antonio Ospite, Rafael J Wysocki)"

* tag 'pm+acpi-4.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PNP: add two IDs to list for PNPACPI device enumeration
  ACPI / documentation: Fix ambiguity in the GPIO properties document
  ACPI / documentation: fix a sentence about GPIO resources
  ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook
  x86/PCI/ACPI: Make all resources except [io 0xcf8-0xcff] available on PCI bus
2015-05-07 15:58:00 -07:00
Rafael J. Wysocki 9a5d9315e4 Merge branches 'acpi-resources', 'acpi-battery', 'acpi-doc' and 'acpi-pnp'
* acpi-resources:
  x86/PCI/ACPI: Make all resources except [io 0xcf8-0xcff] available on PCI bus

* acpi-battery:
  ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook

* acpi-doc:
  ACPI / documentation: Fix ambiguity in the GPIO properties document
  ACPI / documentation: fix a sentence about GPIO resources

* acpi-pnp:
  ACPI / PNP: add two IDs to list for PNPACPI device enumeration
2015-05-07 21:24:34 +02:00
Fabio Estevam dc0e3db4ec ARM: multi_v7_defconfig: Select more FSL SoCs
Select IMX50, IMX6SX and LS1021A SoC support.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-05-07 18:31:00 +02:00
Arnd Bergmann bd1a6e7b47 This fixes an MMC/SD configuration issue present for some time
in the Ux500 DT but triggered by proper error handling in v4.1-rc1.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVP3/HAAoJEEEQszewGV1zl14QALjFq5SHR2sZJMxpXtnPA9+o
 Gh/Xe+zx59VqxVFuxT13zY3YcD1b61DSQ4L8oLkMeNNx4Q3+YV4rl50aLiy3DUxf
 oOHuIObv7rj70sYXVtMXX64mJCjAu9Y4+WAW4kqVrt5mnewptWp29jw7ioum6/+Q
 NXg/qNGwRMmhvcDOybKMfTsro7g6VnB+qMDbm4//IOJlgldS13tUFGhRGdkC0mkM
 pjM0a0bj2hHvkJ6+cvzzId3hcjVZwhqValOMA+rKdFTxarMFxUM3+QskhuVTl3ew
 x+4uvXWmRa+44w4u9DgRXeIBXavpS2CpdqQkvuNPRa9IPD89iFGc5PaU9iCOchg8
 xvN6l1Vm5pYbnmboLyT4aQ7MfFaScodFAQKIAJMUpMDl6CxjujQe7YEviLajuEQr
 mDpap2Nc6Bdo9zcRzZ/PxJIvNXHe/MqAF0unsdTLEgyASrnkawxizLJ5rMsAJfAJ
 ONI2DAafJenCf8wZV0XFzI1L4/UnH76w3r0DETV1YfExr3Wnx2c4ZcPJKXINcp1K
 mle2dKsmN6q300hrOMyMPaykz1ndWhhkfy3d+Y3O8LE+hhjfJbZv+VWAOe0UaN+Q
 pMDCngI+uoM63Vsh5WDe7x3M5AZ2QK3B/gWgwfDQ8KINnejBjfwH9LMnNSqDtdbz
 jNtxHeeGAF86v8dCiXi7
 =2YtL
 -----END PGP SIGNATURE-----

Merge tag 'stericsson-fixes-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into fixes

Merge "Ux500 fixes" from Linus Walleij:

This fixes an MMC/SD configuration issue present for some time
in the Ux500 DT but triggered by proper error handling in v4.1-rc1.

* tag 'stericsson-fixes-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  ARM: ux500: Enable GPIO regulator for SD-card for snowball
  ARM: ux500: Enable GPIO regulator for SD-card for HREF boards
  ARM: ux500: Move GPIO regulator for SD-card into board DTSs
2015-05-07 18:28:04 +02:00
Arnd Bergmann 1e5f9ed00d Renesas ARM Based SoC Fixes for v4.1
* Fix adv7511 IRQ sensing on koelsch board
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVSvu3AAoJENfPZGlqN0++1QcP/jLw1/i6dAPBYj0E74muYVtN
 YfywFWvIQg4SAlJCNF5OZ/PFzofSMkOJQj+DRMUSQm7RRMW5jGMF8MNoL6JxE0VL
 puFUtKIrSn9q72Pn/n50RAFXJQvuo3rXV1Lp52lZRaBbno6tDNsLimkvo+Xvy7zh
 eeEMll5N/pS8P2J44wUAUGQ86yZwlXdcyoNd8vO2x5JXCKrLtybneRBa1nTlnGKL
 kvj9f380ihrWdjD2h0vKsdNBl2CoAPQD+IxcwVKVHZKM0wNmyZkezLPscwrbp8cR
 u2PcukydvPf/pyXmxwc2vi1xgNV4sX4RSKHRapbJOFwdwnBrXcR+FWF8d6M+xHh4
 oe0i/IjmH0VqwdGavY4qJAXnkLAlpvTJFU/ZsqjN7ac3bPCGzRgKOwNAF7A+xvhF
 9ElP+ikj4qJE+VpK3tpQQ6a941lded5D/i1zxPLmZYzUQjriKdPW+mVQasnJqmXo
 fVgOInrbpcW2tFOwkkkvnRPvNR3sSY+40SydIMrYnSaAD1fjCcs+BKUExEKJLXfC
 vQ7yIigJXhTWFP2vop49rNosohAfTyATgyzPUW62OIuq4Z3ejOrK9WuYlm4csB8O
 pa2fZzFl8m217MseB/ZJSky9LK8jrwi5Ip1MWAMfF+lq6oU5l22E1tcHuOsTisu2
 47KU9zwFfxMS/nGEZvgY
 =9mf9
 -----END PGP SIGNATURE-----

Merge tag 'renesas-fixes-for-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes

Merge "Renesas ARM Based SoC Fixes for v4.1" from Simon Horman:

* Fix adv7511 IRQ sensing on koelsch board

* tag 'renesas-fixes-for-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: koelsch: Fix adv7511 IRQ sensing
2015-05-07 18:26:48 +02:00
Arnd Bergmann 443318e0b7 Fixes for omaps, mostly a fix for power power consumption
creeping up during idle, and two l3-noc device fixes:
 
 - Fix power consumption creeping up with I2C4 staying on
 - Fix n900 microphone bias voltages
 - Fix dra7 l3-noc for host clock
 - Fix omap5 l3-noc id address decoding
 
 The rest are all just minor dts fixes:
 
 - Fix changed EXTCON_USB_GPIO_USB in defconfig
 - Fix missing isp and iva #iommu-cells property
 - Various beagle x15 dts fixes for pre-production changes
 - Fix am437x-sk display dts entries
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVR9VWAAoJEBvUPslcq6VzQSEP/1D526fNwGoivn3MmV5yi2yV
 alVYxbcxOAbRrintH+ip2LXOzuQ4OdsMD+PbF9OzdiW2ynPiINq/tuchwC0vVcvU
 Tv7kUA9GjeT/s+0pNodQYLRxAksw0SnBmz4ZnUwaY46MjGwO6nRirKtE1Ucb96M2
 A61swMKtE+lYxc4Zxrr0QU7MRas7ukC9IGOjAFDasTzr3T/xm0IsWz79PE3rMVlI
 kUncW+g42RigeikzpqTELU5lvmRzobO47MWHWsECyyIiLp9fsei+r8HmJc0gosaz
 CTuUydUYNbxM9xbCKFXb2n7hBCzGiySQpFR25LXHJ8AAXKhR44rwjoZMwCF6j50C
 ad5NXik/FcLuI8HSqFOPc0gIFIk4oM+0AmRGGvaKgBt1Wv2gViCtd+0CNuk07/vE
 sFCc0Mnek9oLdWMwvSQ0g4ehJP/ejWiu1ZGsrQN7OliMe84340AkIVblMrHF6v4I
 OULFeMr1e+/XVNaj15YXQBMRbNK7JcR+npPzhGZvuXnio73VuwbIOaz42CSnY3EI
 ZiRLBfr8yGP5NQXOWNPp5ig+zcRviNRvr5o7hYR8LRtIyHvOGOafpSRn+7T0FEXK
 SBD1u1yXoCB2rwoulTSWWVplUD5yn8duv0gDAGXgBuWhTuTdHc5FPbLf8KZ0KSsW
 qGh6zuo3GvYJHi88DVjX
 =tOGf
 -----END PGP SIGNATURE-----

Merge tag 'omap-for-v4.1/fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Merge "omap fixes against v4.1-rc1" from Tony Lindgren:

Fixes for omaps, mostly a fix for power power consumption
creeping up during idle, and two l3-noc device fixes:

- Fix power consumption creeping up with I2C4 staying on
- Fix n900 microphone bias voltages
- Fix dra7 l3-noc for host clock
- Fix omap5 l3-noc id address decoding

The rest are all just minor dts fixes:

- Fix changed EXTCON_USB_GPIO_USB in defconfig
- Fix missing isp and iva #iommu-cells property
- Various beagle x15 dts fixes for pre-production changes
- Fix am437x-sk display dts entries

* tag 'omap-for-v4.1/fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  bus: omap_l3_noc: Fix master id address decoding for OMAP5
  bus: omap_l3_noc: Fix offset for DRA7 CLK1_HOST_CLK1_2 instance
  ARM: dts: dra7: Fix efuse register size for ABB
  ARM: dts: am57xx-beagle-x15: Switch GPIO fan number
  ARM: dts: am57xx-beagle-x15: Switch UART mux pins
  ARM: dts: am437x-sk: reduce col-scan-delay-us
  ARM: dts: am437x-sk: fix for new newhaven display module revision
  ARM: dts: am57xx-beagle-x15: Fix RTC aliases
  ARM: dts: am57xx-beagle-x15: Fix IRQ type for mcp7941x
  ARM: dts: omap3: Add #iommu-cells to isp and iva iommu
  ARM: omap2plus_defconfig: Enable EXTCON_USB_GPIO
  ARM: dts: OMAP3-N900: Add microphone bias voltages
  ARM: OMAP2+: Fix omap off idle power consumption creeping up
2015-05-07 18:25:38 +02:00
Arnd Bergmann 654758ae09 mvebu fix for 4.1
Disable the unused internal RTC in the dts of the OpenBlock AX3
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iEYEABECAAYFAlVDtLIACgkQCwYYjhRyO9WCiwCfTBYFFDMZxK/W9qLdhU8mj/iD
 tDQAn3TDsfWEIHm+c6DeZqj35Q74yPGA
 =Gggv
 -----END PGP SIGNATURE-----

Merge tag 'mvebu-fixes-4.1' of git://git.infradead.org/linux-mvebu into fixes

Pull "mvebu fix for 4.1" from Gregory CLEMENT:

Disable the unused internal RTC in the dts of the OpenBlock AX3

* tag 'mvebu-fixes-4.1' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: armada-xp-openblocks-ax3-4: Disable internal RTC
2015-05-07 18:23:49 +02:00
Arnd Bergmann 1be518bd0b ARM: pxa: fixes for v4.1-rc2
These fixes reenable the lubbock(pxa25x) and mainstone(pxa27x)
 platforms, which were broken since the gpio handling was
 converted to a driver, and the interrupt ordering broke the
 external interrupts of these systems.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVQ13WAAoJEAP2et0duMsS98kP/2n5hHDdvIIC+ZSdhrNE/m4r
 R6f8xdmzx1701Q5vEXmYRh7TjgpvlZU1FQ5Im6kN8YidtEYWKuOdZOulKc/wDeS5
 +c2UlzF5RHdWSy2TwLFFLJ3fs6EmHl+GfisjJd5q9ht9GtwLonv8qNlOniQFvSTs
 i6XAKNoSLUDwZVzt4FxAhUud+bSiJBUP9bqhvT+ALeziTF7vd4rrRH2R21+zaHFB
 nQrWFDAkpEj0BT9PuxCNK/HZ5G5/+BH7k7MqGQpvRgVux0jzbJTIFsDTS6TPBMPT
 eM5TkWJCnW1/CvYn/clRIbT5BRJiAIOLt+2/4dt3a71/LDxhTw1/9xz0H9Fra87x
 U2giDIk3TFrgALLZoSqLY6n151baK2m6lf5UdjegCGAEQD2eIbhPos8VZ+zbvSjl
 BLarZSNFiBIau747jClYTSfjt4a626GaFbA49KASB/yKd/mi+V1td4DPLZ8LjCYB
 YSu9aQPS5OAVpYc2Xtc7qKwga+8DhKLlkmAQdXb+kCET4xI57geJ1abzNxTHAPbm
 qRUlWEigWUlkjlooY180h5/MCzosYeQ6cAYmStNxPVmhDZvL1ZicQBaVECZbIOIp
 G6aZwXoPEIKVJKO118tRUTrae6JdjMC1yCF5o5p7Wst4SOrgLOP6Fk/9YoeB+Qjb
 0wnq1eaBtpJ93MWlxF4r
 =bvjh
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-v4.1-rc2' of https://github.com/rjarzmik/linux into fixes

Merged "ARM: pxa: fixes for v4.1-rc2" from Robert Jarzmik:

These fixes reenable the lubbock(pxa25x) and mainstone(pxa27x)
platforms, which were broken since the gpio handling was
converted to a driver, and the interrupt ordering broke the
external interrupts of these systems.

* tag 'fixes-for-v4.1-rc2' of https://github.com/rjarzmik/linux:
  ARM: pxa: lubbock: use new pxa_cplds driver
  ARM: pxa: mainstone: use new pxa_cplds driver
  ARM: pxa: pxa_cplds: add lubbock and mainstone IO
2015-05-07 18:23:00 +02:00
Arnd Bergmann c92b83a81a The i.MX fixes for 4.1:
- A couple of imx23-olinuxino device tree fixes regarding to LED GPIO
    polarity and USB dr_mode setting
  - One i.MX28 device tree fix on AUART4 TX-DMA interrupt name
  - Add missing pwm-cells to PWM4 for i.MX25 device tree
  - Fix imx6q-phytec device tree to get correct USB VBUS control
  - Drop invalid pinctrl-assert-gpios property from imx6qdl-sabreauto
    device tree, which was sneaked in from vendor device tree
  - One fix on Wolfram's broken email address
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJVQO+yAAoJEFBXWFqHsHzOWkwH/RQGJQOAXT5QFwCxwjJ8rWbQ
 QdB7SWUFufEoAUura83ZrER3FT1WmIRrtvLYypdopUUPhABT8cir5nwRjVd0iMc1
 NaC31HohR27N3XZ0zt8yFlvpm03MSYirgpPyB8/tkvMhMv3ghlz5az2PzoAzc5vl
 X9uOricn+gKWZsOYQ2X90VJtvNtipV64NKhwEWkg+t1lyxZmfcP30iY8LM3/B21D
 qP4k08SIuPo3YoIPjITSmHqtzgp5X9Rf1FTfKmBvecBtt5W4GfrbtsylTvC1ISQC
 p4FhDBOrN8hRl1ocbSQvFQybz2poOF/UTFwpWHtAPJxwY11j+IDs2SC33H7whXs=
 =H+ZO
 -----END PGP SIGNATURE-----

Merge tag 'imx-fixes-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes

Pull "The i.MX fixes for 4.1" from Shawn Guo:

 - A couple of imx23-olinuxino device tree fixes regarding to LED GPIO
   polarity and USB dr_mode setting
 - One i.MX28 device tree fix on AUART4 TX-DMA interrupt name
 - Add missing pwm-cells to PWM4 for i.MX25 device tree
 - Fix imx6q-phytec device tree to get correct USB VBUS control
 - Drop invalid pinctrl-assert-gpios property from imx6qdl-sabreauto
   device tree, which was sneaked in from vendor device tree
 - One fix on Wolfram's broken email address

* tag 'imx-fixes-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: dts: imx6qdl-sabreauto: remove pinctrl-assert-gpios
  ARM: dts: imx28: Fix AUART4 TX-DMA interrupt name
  ARM: dts: imx25: Add #pwm-cells to pwm4
  ARM: dts: imx6: phyFLEX: USB VBUS control is active-high
  ARM: mach-imx: devices: platform-sdhci-esdhc-imx: fix broken email address
  ARM: dts: imx23-olinuxino: Fix dr_mode of usb0
  ARM: dts: imx23-olinuxino: Fix polarity of LED GPIO
2015-05-07 18:21:57 +02:00
Arnd Bergmann d6bcc8069b Two fixes from Chris Zhong, fixing some suspend oddities.
And I've given up on the timer7 issue. While I initially thought
 devices would either have both the grave mmu issue requiring a uboot
 update and the timer7 issue or none, it looks like in all units in the
 field the mmu issue got fixed while the timer7 issue stayed on.
 So instead of making everybody wanting to use mainline jump through a
 hoop just make sure timer7 is on on boot before we init the arch-timer.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABCAAGBQJVOsT2AAoJEPOmecmc0R2BQyQH/A94imdnOCWSoSw0xE7xBm04
 QgTBaI4CHspFiSdE2Y0/2rCnaJ1xyWL/YOdcqAGRHDIRGQtBdILivoO1xRc875Sh
 xI274cxNrKsI6v0PuX09uDXcv7jQOY1TAad8wkFq99+r1AguvR6Fcqh0thSwCm/o
 Bt0SLmfQp9zzFwuOz4YYIfoCHXicfnxLZ79KsYqvHWuF/C4FMxQ2dabn/2bRMapH
 ad8nQUwcUpgnLZF6rdEsebAzHplfItLq35ZxDWm5RGL9qSX44fVPbGeNGymqbmBn
 8tX1eqVbDpe9WUVWxeeJEvi/MXWiJRP7FVvxn1+ORP/nWNJp0/1qOXYj9huTcys=
 =zFY0
 -----END PGP SIGNATURE-----

Merge tag 'v4.1-rockchip-socfixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into fixes

Merge "ARM: rockchip: some soc-level fixes for 4.1" from Heiko Stübner:

Two fixes from Chris Zhong, fixing some suspend oddities.
And I've given up on the timer7 issue. While I initially thought
devices would either have both the grave mmu issue requiring a uboot
update and the timer7 issue or none, it looks like in all units in the
field the mmu issue got fixed while the timer7 issue stayed on.
So instead of making everybody wanting to use mainline jump through a
hoop just make sure timer7 is on on boot before we init the arch-timer.

* tag 'v4.1-rockchip-socfixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  rockchip: make sure timer7 is enabled on rk3288 platforms
  ARM: rockchip: fix undefined instruction of reset_ctrl_regs
  ARM: rockchip: disable dapswjdp during suspend
2015-05-07 18:19:27 +02:00
Linus Torvalds 0e1dc42748 xen: bug fixes for 4.1-rc2
- Fix blkback regression if using persistent grants.
 - Fix various event channel related suspend/resume bugs.
 - Fix AMD x86 regression with X86_BUG_SYSRET_SS_ATTRS.
 - SWIOTLB on ARM now uses frames <4 GiB (if available) so device only
   capable of 32-bit DMA work.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQEcBAABAgAGBQJVSiC1AAoJEFxbo/MsZsTRojgH/1zWPD0r5WMAEPb6DFdb7Ga1
 SqBbyHFu43axNwZ7EvUzSqI8BKDPbTnScQ3+zC6Zy1SIEfS+40+vn7kY/uASmWtK
 LYaYu8nd49OZP8ykH0HEvsJ2LXKnAwqAwvVbEigG7KJA7h8wXo7aDwdwxtZmHlFP
 18xRTfHcrnINtAJpjVRmIGZsCMXhXQz4bm0HwsXTTX0qUcRWtxydKDlMPTVFyWR8
 wQ2m5+76fQ8KlFsoJEB0M9ygFdheZBF4FxBGHRrWXBUOhHrQITnH+cf1aMVxTkvy
 NDwiEebwXUDHacv21onszoOkNjReLsx+DWp9eHknlT/fgPo6tweMM2yazFGm+JQ=
 =W683
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-4.1b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - fix blkback regression if using persistent grants

 - fix various event channel related suspend/resume bugs

 - fix AMD x86 regression with X86_BUG_SYSRET_SS_ATTRS

 - SWIOTLB on ARM now uses frames <4 GiB (if available) so device only
   capable of 32-bit DMA work.

* tag 'for-linus-4.1b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: Add __GFP_DMA flag when xen_swiotlb_init gets free pages on ARM
  hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests
  xen/events: Set irq_info->evtchn before binding the channel to CPU in __startup_pirq()
  xen/console: Update console event channel on resume
  xen/xenbus: Update xenbus event channel on resume
  xen/events: Clear cpu_evtchn_mask before resuming
  xen-pciback: Add name prefix to global 'permissive' variable
  xen: Suspend ticks on all CPUs during suspend
  xen/grant: introduce func gnttab_unmap_refs_sync()
  xen/blkback: safely unmap purge persistent grants
2015-05-06 15:58:06 -07:00
Linus Torvalds 3d54ac9e35 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "EFI fixes, and FPU fix, a ticket spinlock boundary condition fix and
  two build fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Always restore_xinit_state() when use_eager_cpu()
  x86: Make cpu_tss available to external modules
  efi: Fix error handling in add_sysfs_runtime_map_entry()
  x86/spinlocks: Fix regression in spinlock contention detection
  x86/mm: Clean up types in xlate_dev_mem_ptr()
  x86/efi: Store upper bits of command line buffer address in ext_cmd_line_ptr
  efivarfs: Ensure VariableName is NUL-terminated
2015-05-06 10:57:37 -07:00
Linus Torvalds d8fce2db72 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, but also an uncore PMU driver fix and an uncore
  PMU driver hardware-enablement addition"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf probe: Fix segfault if passed with ''.
  perf report: Fix -T/--threads option to work again
  perf bench numa: Fix immediate meeting of convergence condition
  perf bench numa: Fixes of --quiet argument
  perf bench futex: Fix hung wakeup tasks after requeueing
  perf probe: Fix bug with global variables handling
  perf top: Fix a segfault when kernel map is restricted.
  tools lib traceevent: Fix build failure on 32-bit arch
  perf kmem: Fix compiles on RHEL6/OL6
  tools lib api: Undefine _FORTIFY_SOURCE before setting it
  perf kmem: Consistently use PRIu64 for printing u64 values
  perf trace: Disable events and drain events when forked workload ends
  perf trace: Enable events when doing system wide tracing and starting a workload
  perf/x86/intel/uncore: Move PCI IDs for IMC to uncore driver
  perf/x86/intel/uncore: Add support for Intel Haswell ULT (lower power Mobile Processor) IMC uncore PMUs
  perf/x86/intel: Add cpu_(prepare|starting|dying) for core_pmu
2015-05-06 10:47:25 -07:00
Stefano Stabellini 8746515d7f xen: Add __GFP_DMA flag when xen_swiotlb_init gets free pages on ARM
Make sure that xen_swiotlb_init allocates buffers that are DMA capable
when at least one memblock is available below 4G. Otherwise we assume
that all devices on the SoC can cope with >4G addresses. We do this on
ARM and ARM64, where dom0 is mapped 1:1, so pfn == mfn in this case.

No functional changes on x86.

From: Chen Baozi <baozich@gmail.com>

Signed-off-by: Chen Baozi <baozich@gmail.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Chen Baozi <baozich@gmail.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-05-06 15:02:58 +01:00
Bobby Powers c88d47480d x86/fpu: Always restore_xinit_state() when use_eager_cpu()
The following commit:

  f893959b08 ("x86/fpu: Don't abuse drop_init_fpu() in flush_thread()")

removed drop_init_fpu() usage from flush_thread(). This seems to break
things for me - the Go 1.4 test suite fails all over the place with
floating point comparision errors (offending commit found through
bisection).

The functional change was that flush_thread() after this commit
only calls restore_init_xstate() when both use_eager_fpu() and
!used_math() are true. drop_init_fpu() (now fpu_reset_state()) calls
restore_init_xstate() regardless of whether current used_math() - apply
the same logic here.

Switch used_math() -> tsk_used_math(tsk) to consistently use the grabbed
tsk instead of current, like in the rest of flush_thread().

Tested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Riikonen <priikone@iki.fi>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: f893959b ("x86/fpu: Don't abuse drop_init_fpu() in flush_thread()")
Link: http://lkml.kernel.org/r/1430147441-9820-1-git-send-email-bobbypowers@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-06 11:22:03 +02:00
Ingo Molnar c102cb097d * Avoid garbage names in efivarfs due to buggy firmware by zero'ing
EFI variable name - Ross Lagerwall
 
  * Stop erroneously dropping upper 32-bits of boot command line pointer
    in EFI boot stub and stash them in ext_cmd_line_ptr - Roy Franz
 
  * Fix double-free bug in error handling code path of EFI runtime map
    code - Dan Carpenter
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVSOSjAAoJEC84WcCNIz1VXk4P/R4GwmmzZBdYAseiwv6u/NRm
 bTXnK7SN1ZyY8WibEm8ptXJuTIyXZxmQYr4lY97canJy8P7umtoCP7P3tS0Ier8U
 N1AMFGes7xlwBhjIRz2Cr9e5plr5H3qk65JNMuUDp0/MVuPEiNEzi6efbL82dh9S
 RCLxQ94paX+wV6ltQMKWGD3v0WnHkzouuCdETCGaozqQmJx6PGzDmJ51kXYRWDyP
 esTCZpRHlIzKN0u3XEFgswlIev2wab0BtjXYOzUqb0AH1Q13OgQfiswX3WIG6k+c
 3xuMH4JByBIDwOLudgu0D6Sst2QwVJZnw6JavoEgGCFao0n6IPzUGolAWLFMdDhL
 Kparzc6ObHpiqYtqBjJXW+awOENVS4qIrn9MHc9wwsJxXOy++0YnyYCgge0iia47
 F2/pOHvkd52QiQ0gC442W0EdX1VlPCUR04G0s4d3UX3O875yl80QTyLQ4n7ZK074
 3wfi/9+Fuv8wWMJ4HI8FJgaTl57KzAP4ZPh2cy8oPs6bkiiwlnMWH24bEhlxKBK4
 mEIze045kyswz3rV7j1WX3MSXrPA2cM95L5WlvVTxckMn40QwLPBWSDCOJIj3K5K
 yhXNHHfHzG/GRm3SfD2i1EcK4gUW82awl72jJn0F69YMI5a+T1BIppEMP2pzsWE4
 FcwvWDxzWwKxYKJosfkk
 =f7a2
 -----END PGP SIGNATURE-----

Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent

Pull EFI fixes from Matt Fleming:

 * Avoid garbage names in efivarfs due to buggy firmware by zeroing
   EFI variable name. (Ross Lagerwall)

 * Stop erroneously dropping upper 32 bits of boot command line pointer
   in EFI boot stub and stash them in ext_cmd_line_ptr. (Roy Franz)

 * Fix double-free bug in error handling code path of EFI runtime map
   code. (Dan Carpenter)

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-06 08:30:24 +02:00
Marc Dionne de71ad2c97 x86: Make cpu_tss available to external modules
Commit 75182b1632 ("x86/asm/entry: Switch all C consumers of
kernel_stack to this_cpu_sp0()") changed current_thread_info
to use this_cpu_sp0, and indirectly made it rely on init_tss
which was exported with EXPORT_PER_CPU_SYMBOL_GPL.
As a result some macros and inline functions such as set/get_fs,
test_thread_flag and variants have been made unusable for
external modules.

Make cpu_tss exported with EXPORT_PER_CPU_SYMBOL so that these
functions are accessible again, as they were previously.

Signed-off-by: Marc Dionne <marc.dionne@your-file-system.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/1430763404-21221-1-git-send-email-marc.dionne@your-file-system.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-05-05 20:40:31 +02:00
Boris Ostrovsky a71dbdaa8c hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests
Commit 61f01dd941 ("x86_64, asm: Work around AMD SYSRET SS descriptor
attribute issue") makes AMD processors set SS to __KERNEL_DS in
__switch_to() to deal with cases when SS is NULL.

This breaks Xen PV guests who do not want to load SS with__KERNEL_DS.

Since the problem that the commit is trying to address would have to be
fixed in the hypervisor (if it in fact exists under Xen) there is no
reason to set X86_BUG_SYSRET_SS_ATTRS flag for PV VPCUs here.

This can be easily achieved by adding x86_hyper_xen_hvm.set_cpu_features
op which will clear this flag. (And since this structure is no longer
HVM-specific we should do some renaming).

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-05-05 18:27:43 +01:00
Tahsin Erdogan e8a4a2696f x86/spinlocks: Fix regression in spinlock contention detection
A spinlock is regarded as contended when there is at least one waiter.
Currently, the code that checks whether there are any waiters rely on
tail value being greater than head. However, this is not true if tail
reaches the max value and wraps back to zero, so arch_spin_is_contended()
incorrectly returns 0 (not contended) when tail is smaller than head.

The original code (before regression) handled this case by casting the
(tail - head) to an unsigned value. This change simply restores that
behavior.

Fixes: d6abfdb202 ("x86/spinlocks/paravirt: Fix memory corruption on unlock")
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Cc: peterz@infradead.org
Cc: Waiman.Long@hp.com
Cc: borntraeger@de.ibm.com
Cc: oleg@redhat.com
Cc: raghavendra.kt@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1430799331-20445-1-git-send-email-tahsin@google.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-05-05 11:01:38 +02:00
Suman Anna e7309c2673 bus: omap_l3_noc: Fix master id address decoding for OMAP5
The L3 Error handling on OMAP5 for the most part is very similar
to that of OMAP4, and had leveraged common data structures and
register layout definitions so far. Upon closer inspection, there
are a few minor differences causing an incorrect decoding and
reporting of the master NIU upon an error:

  1. The L3_TARG_STDERRLOG_MSTADDR.STDERRLOG_MSTADDR occupies
     11 bits on OMAP5 as against 8 bits on OMAP4, with the master
     NIU connID encoded in the 6 MSBs of the STDERRLOG_MSTADDR
     field.
  2. The CLK3 FlagMux component has 1 input source on OMAP4 and 3
     input sources on OMAP5. The common DEBUGSS source is at a
     different input on each SoC.

Fix the above issues by using a OMAP5-specific compatible property
and using SoC-specific data where there are differences.

Signed-off-by: Suman Anna <s-anna@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 10:21:01 -07:00
Nishanth Menon 1822734677 ARM: dts: dra7: Fix efuse register size for ABB
Fix a typo in DRA7 dtsi where 12 bytes are needed for register
description of ABB efuse registers, however only 8 bytes are provided
to map. For some weird reason, this does not generate abort at offset
0x8, probably due to default maps already provided in io.c for the bus
register ranges.

Reported-by: Matt Gessner <Matt.Gessner@windriver.com>
Reported-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:25:46 -07:00
Nishanth Menon ed12f102ba ARM: dts: am57xx-beagle-x15: Switch GPIO fan number
BeagleBoard-X15 pre-production change includes switching the GPIO fan
gpio over from 1 to 2 to allow for a potential fix at a later point in
time for USB client VBUS detection using PMIC VBUS detect capability.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:23:58 -07:00
Nishanth Menon 5eb6719816 ARM: dts: am57xx-beagle-x15: Switch UART mux pins
BeagleBoard-X15 pre-production change includes switching over to UART
pins that now allow for UART download capability. All original boards
should either have been returned for modifications or already modified
for the required change and maintaining compatibility for older boards
are no longer needed.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:23:37 -07:00
Felipe Balbi f6b957fdce ARM: dts: am437x-sk: reduce col-scan-delay-us
The new AM437x SK Beta boards have removed the
large capacitors on the gpio-matrix column lines
which means we can reduce col-scan-delay-us to 5us
without loosing functionality.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:21:02 -07:00
Felipe Balbi faa4ec1eed ARM: dts: am437x-sk: fix for new newhaven display module revision
AM437x Starter Kit uses a NewHaven Display module with
a 4.3" display and EDT FT5306 touchscreen

On that module's new revision, NewHave decided to change
the pinout on the 6 pin flat-pcb touchscreen connector so
that instead of having WAKE pin, we now have RESETn.

The new display module is available on AM437x SK Beta and
all new revisions while the older revision is only available
on AM437x SK Alpha which, unfortunately, can't be supported
anymore in mainline without a revert of this patch.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:21:02 -07:00
Nishanth Menon 00edd3170c ARM: dts: am57xx-beagle-x15: Fix RTC aliases
With commit bc078316d8 ("ARM: dts: DRA7: Add node for RTC"), we now
have AM57xx RTC register itself as alias 0 even before DS1307 or TPS
rtc drivers are loaded up. However, since neither TPS, nor AM57xx RTC
are capable of being backedup by battery, we would like to maintain
the "primary" rtc as mcp79410 rtc device.

This also generates the following warnings in the bootlog highlighting
the issue:
[    5.895445] rtc-ds1307 2-006f: /aliases ID 0 not available
...
[    6.476285] palmas-rtc 48070000.i2c:tps659038@58:tps659038_rtc: /aliases ID 1 not available

So, add proper aliases to ensure that RTC order is always consistent
to userspace immaterial of probe order.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:21:02 -07:00
Grygorii Strashko e7a7357341 ARM: dts: am57xx-beagle-x15: Fix IRQ type for mcp7941x
The interrupt polarity provided in devicetree is used to configure
the interrupt controller(ARM GIC), however, it seems that we have an
inverter at the GIC boundary inside AM57xx which inverts the signal
input from sys_irq external interrupt source.

Further, as per GIC distributor TRM,
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0438d/BGBHIACJ.html#BABJFCFB
ARM GIC distributor does not support IRQ trigger type
IRQ_TYPE_LEVEL_LOW, and only rising or level high signals.

However, for some reason, the current configuration(which gets ignored
by GIC driver) functions on some platforms, however, on few platforms
results in infinite interrupts hogging the system down.

Switch over to rising edge for GIC configuration which is also aligned
with trigger point from the RTC chip and the internal inversion.

Fixes: 5a0f93c657 ("ARM: dts: Add am57xx-beagle-x15")
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:21:02 -07:00
Sebastian Reichel 2055088b5e ARM: dts: omap3: Add #iommu-cells to isp and iva iommu
Add missing #iommu-cells property to the isp and iva iommu nodes. This
fixes the binding (property is required according to the generic iommu
binding) and removes the following kernel warning triggered once the
iommu nodes are referenced:

[    0.647521] /ocp/isp@480bc000: could not get #iommu-cells for /ocp/mmu@480bd400

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:12:32 -07:00
Roger Quadros 67defd5c0e ARM: omap2plus_defconfig: Enable EXTCON_USB_GPIO
We need to enable EXTCON_USB_GPIO_USB and not
EXTCON_GPIO_USB.

Fixes: c08a54c0eb ("ARM: omap2plus_defconfig: Enable EXTCON_GPIO_USB")

Reported-by: Nishant Menon <nm@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by-by: Nishanth Menon <nm@ti.com
Tested-by: Nishanth Menon <nm@ti.com
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:10:24 -07:00
Pavel Machek 1819e3034e ARM: dts: OMAP3-N900: Add microphone bias voltages
N900 audio recording needs that codec provides bias voltage for integrated
digital microphone and headset microphone depending which one is used.
Digital microphone uses 2 V bias and it comes from the codec A part. Codec
B part drives the headset microphone bias and that is set to 2.5 V.

Cc: stable@vger.kernel.org # v3.16+
Signed-off-by: Pavel Machek <pavel@ucw.cz>
[Jarkko: Headset mic bias changed to 2 (2.5 V) as it was before commit
e2e8bfdf61 ("ASoC: tlv320aic3x: Convert mic bias to a supply widget")]
Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 09:04:43 -07:00
Tony Lindgren 102bcb6ed2 ARM: OMAP2+: Fix omap off idle power consumption creeping up
If we use a combination of VMODE and I2C4 for retention modes,
eventually the off idle power consumption will creep up by about
23mW, even during off mode with I2C4 always staying enabled.

Turns out this is because of erratum i531 "Extra Power Consumed
When Repeated Start Operation Mode Is Enabled on I2C Interface
Dedicated for Smart Reflex (I2C4)" as pointed out by Nishanth
Menon <nm@ti.com>.

Let's fix the issue by adding i2c_cfg_clear_mask for the bits
to clear when initializing the I2C4 adapter so we can clear
SREN bit that drives the I2C4 lines low otherwise when there
is no traffic.

Fixes: 3b8c4ebb76 ("ARM: OMAP3: Fix idle mode signaling for
Cc: stable@vger.kernel.org # v3.16+
sys_clkreq and sys_off_mode")
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-04 08:54:41 -07:00
Will Deacon 3b8786ff7a ARM: 8352/1: perf: Fix the pmu node name in warning message
With commit 9fd85eb502 ("ARM: pmu: add support for interrupt-affinity
property"), we print a warning when we find a PMU SPI with a missing
missing interrupt-affinity property in a pmu node. Unfortunately, we
pass the wrong (NULL) device node to of_node_full_name, resulting in
unhelpful messages such as:

 hw perfevents: Failed to parse <no-node>/interrupt-affinity[0]

This patch fixes the name to that of the pmu node.

Fixes: 9fd85eb502 (ARM: pmu: add support for interrupt-affinity property)

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:23:44 +01:00
Will Deacon 338d9dd3e2 ARM: 8351/1: perf: don't warn about missing interrupt-affinity property for PPIs
PPIs are affine by nature, so the interrupt-affinity property is not
used and therefore we shouldn't print a warning in its absence.

Reported-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:23:44 +01:00
Andrew Lunn 59c3191628 ARM: 8350/1: proc-feroceon: Fix feroceon_proc_info macro
bf35706f3d ("ARM: 8314/1: replace PROCINFO embedded branch with
relative offset") broke booting for Kirkwood. The kernel would say:

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Error: unrecognized/unsupported processor variant (0x56251311).

Fix it by removing the extraneous .long __feroceon_setup from the
feroceon_proc_info macro.

Fixes: bf35706f3d ("ARM: 8314/1: replace PROCINFO embedded branch with relative offset")
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:23:09 +01:00
Valentin Rothberg 13f2fa7cb3 ARM: 8349/1: arch/arm/mm/proc-arm925.S: remove dead #ifdef block
The block could never be compiled;  CPU_ICACHE_STREAMING_DISABLE has not
been defined in Kconfig since the very first Git commit.  Hence, we can
safely remove the entire block.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:22:27 +01:00
Valentin Rothberg 024587dc21 ARM: 8348/1: remove comments on CPU_ARM1020_CPU_IDLE
CPU_ARM1020_CPU_IDLE is not defined in Kconfig.  The last reference on
LKML dates back to 2001, so we can safely remove the comments to make
static analysis tools happy.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:22:09 +01:00
Marek Szyprowski 1424532b21 ARM: 8347/1: dma-mapping: fix off-by-one check in arm_setup_iommu_dma_ops
Patch 22b3c181c6 ("arm: dma-mapping: limit
IOMMU mapping size") added a check for IO address space size. However
this patch broke IOMMU initialization for typical platforms initialized
from device tree, which get the default IO address space size of 4GiB.
This value doesn't fit into size_t and fails a check introduced by that
commit resulting in failed dma-mapping/iommu initialization. This patch
fixes this issue by adding proper support for full 4GiB address space
size.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-03 23:21:55 +01:00
Linus Torvalds 180d89f6ef powerpc fixes for 4.1 # 2
- Build fix for SMP=n in book3s_xics.c
 - Fix for Daniel's pci_controller_ops on powernv.
 - Revert the TM syscall abort patch for now.
 - CPU affinity fix from Nathan.
 - Two EEH fixes from Gavin.
 - Fix for CR corruption from Sam.
 - Selftest build fix.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVRKvXAAoJEFHr6jzI4aWAQPwP/jctjzdpbt+/Ra+/f48E4TuP
 cLDqbVJcOV+aC0lflXDBwnORn7qff2zzN6yTUcj9lAkq/ILBY7lY8m/bNvj/C0g1
 yH1Bh6EIjKLyqLKyfFnu+H1DU2s+ROhaAFh9JXhW28j7gU0iSwb7kyBlQ3MP7py4
 8OTbVs1vBKg42SND5FX8JsJG7Vk5v/sNz7WXc2HdtIIWQip4tp95vKvftuCABZgj
 2bMfHF5OXCYd3yalVZGeuiIX3ZAezN9F2GpfFoetCn0118Fkp97pfEVkQ0p64tI7
 xomtzgNXZh9jKFvqqhqlcUDFWEpqr27UjB5/ToWa2YKL4ACrYrgvvo+ifL4qLLtb
 M9itrZVfHElHjA0JSn/hDMdaRKBALcyX1+71rvTpGOMvrdtUY7NaD/h+2jQJ6Cz8
 V8o7uI7SGOdGjWtzNV+bHN+bmhF1MKA1WJXk9a1Pexi+T0vtyZNcTQXr00RVoZJp
 zsrE5cZGwgXkz0tlkNK4Zf5U8xURqZKGZWoCxG4kCkwWPPyZZCWH0HDQtNzxMJXJ
 xrxDTuuF9B/B72xZ6UpVHYlIwYGLEzPz5jtL7r9muxjVEuaewT3NmX+3ZAQZKk/f
 hKMiwHpDSKs36K1Afn8g4ycjfzAy2HyL6TVMvHjO8XG14HVyI+tJ49oeqBTRQLO1
 2ZGZCkjGNJd/R1Ii1qeW
 =S0WU
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-4.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

Pull powerpc fixes from Michael Ellerman:
 - build fix for SMP=n in book3s_xics.c
 - fix for Daniel's pci_controller_ops on powernv.
 - revert the TM syscall abort patch for now.
 - CPU affinity fix from Nathan.
 - two EEH fixes from Gavin.
 - fix for CR corruption from Sam.
 - selftest build fix.

* tag 'powerpc-4.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
  powerpc/powernv: Restore non-volatile CRs after nap
  powerpc/eeh: Delay probing EEH device during hotplug
  powerpc/eeh: Fix race condition in pcibios_set_pcie_reset_state()
  powerpc/pseries: Correct cpu affinity for dlpar added cpus
  selftests/powerpc: Fix the pmu install rule
  Revert "powerpc/tm: Abort syscalls in active transactions"
  powerpc/powernv: Fix early pci_controller_ops loading.
  powerpc/kvm: Fix SMP=n build error in book3s_xics.c
2015-05-03 10:28:36 -07:00
Linus Torvalds 036f351e25 arm64 fixes:
- Fix perf devicetree warnings at probe time
 - Fix memory leak in __dma_free()
 - Ensure DMA buffers are always zeroed
 - Show IRQ trigger in /proc/interrupts (for parity with ARM)
 - Implement byte and halfword access for smp_{load_acquire,store_release}
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABCgAGBQJVQlyfAAoJELescNyEwWM0ZTIIAKnK5bIr1jS9wP9wLJ8eZ++y
 8p5RYluqtMBkYzbOpKr8HiJdg6GupNiSq6as+cf5T+Gc2D01HhFocqJbLrOCqJRA
 RG5gFqkx/7FKTCwIt/DSygiwA+szPKTArf3YOi+EuDmCkcgRv38vac8yqlM1rI+M
 UL2vdAEqvjPxPquzeAqrSIcwQ9jAYzEouh8VrMWigLFN5BvCUrO64r1y4zN7hbO1
 RWEKPkIFMLDGCFwCn17mzLafVF2f0JH514sMZEQi2AQA/MlaIS3hM+SFJgxbRzib
 ZRqXujX1Osi9W20VPwMtuUgQymEBQDAbXT35BxehL7MVMZhv66q+LBEabIpDMqM=
 =4S7b
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Not too much here, but we've addressed a couple of nasty issues in the
  dma-mapping code as well as adding the halfword and byte variants of
  load_acquire/store_release following on from the CSD locking bug that
  you fixed in the core.

   - fix perf devicetree warnings at probe time

   - fix memory leak in __dma_free()

   - ensure DMA buffers are always zeroed

   - show IRQ trigger in /proc/interrupts (for parity with ARM)

   - implement byte and halfword access for smp_{load_acquire,store_release}"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: perf: Fix the pmu node name in warning message
  arm64: perf: don't warn about missing interrupt-affinity property for PPIs
  arm64: add missing PAGE_ALIGN() to __dma_free()
  arm64: dma-mapping: always clear allocated buffers
  ARM64: Enable CONFIG_GENERIC_IRQ_SHOW_LEVEL
  arm64: add missing data types in smp_load_acquire/smp_store_release
2015-05-01 07:44:32 -07:00
Sam Bobroff 0aab374709 powerpc/powernv: Restore non-volatile CRs after nap
Patches 7cba160ad "powernv/cpuidle: Redesign idle states management"
and 77b54e9f2 "powernv/powerpc: Add winkle support for offline cpus"
use non-volatile condition registers (cr2, cr3 and cr4) early in the system
reset interrupt handler (system_reset_pSeries()) before it has been determined
if state loss has occurred. If state loss has not occurred, control returns via
the power7_wakeup_noloss() path which does not restore those condition
registers, leaving them corrupted.

Fix this by restoring the condition registers in the power7_wakeup_noloss()
case.

This is apparent when running a KVM guest on hardware that does not
support winkle or sleep and the guest makes use of secondary threads. In
practice this means Power7 machines, though some early unreleased Power8
machines may also be susceptible.

The secondary CPUs are taken off line before the guest is started and
they call pnv_smp_cpu_kill_self(). This checks support for sleep
states (in this case there is no support) and power7_nap() is called.

When the CPU is woken, power7_nap() returns and because the CPU is
still off line, the main while loop executes again. The sleep states
support test is executed again, but because the tested values cannot
have changed, the compiler has optimized the test away and instead we
rely on the result of the first test, which has been left in cr3
and/or cr4. With the result overwritten, the wrong branch is taken and
power7_winkle() is called on a CPU that does not support it, leading
to it stalling.

Fixes: 7cba160ad7 ("powernv/cpuidle: Redesign idle states management")
Fixes: 77b54e9f21 ("powernv/powerpc: Add winkle support for offline cpus")
[mpe: Massage change log a bit more]
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-05-01 16:55:11 +10:00