Commit Graph

455267 Commits

Author SHA1 Message Date
Suravee Suthikulpanit f3a183cb42 arm64/dma: Removing ARCH_HAS_DMA_GET_REQUIRED_MASK macro
Arm64 does not define dma_get_required_mask() function.
Therefore, it should not define the ARCH_HAS_DMA_GET_REQUIRED_MASK.
This causes build errors in some device drivers (e.g. mpt2sas)

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>
2014-06-18 12:41:30 +01:00
Victor Kamensky 2227901a02 arm64: ptrace: fix empty registers set in prstatus of aarch32 process core
Currently core file of aarch32 process prstatus note has empty
registers set. As result aarch32 core files create by V8 kernel are
not very useful.

It happens because compat_gpr_get and compat_gpr_set functions can
copy registers values to/from either kbuf or ubuf. ELF core file
collection function fill_thread_core_info calls compat_gpr_get
with kbuf set and ubuf set to 0. But current compat_gpr_get and
compat_gpr_set function handle copy to/from only ubuf case.

Fix is to handle kbuf and ubuf as two separate cases in similar
way as other functions like user_regset_copyout, user_regset_copyin do.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:41:14 +01:00
Will Deacon 34c65c43f1 arm64: uid16: fix __kernel_old_{gid,uid}_t definitions
Whilst native arm64 applications don't have the 16-bit UID/GID syscalls
wired up, compat tasks can still access them. The 16-bit wrappers for
these syscalls use __kernel_old_uid_t and __kernel_old_gid_t, which must
be 16-bit data types to maintain compatibility with the 16-bit UIDs used
by compat applications.

This patch defines 16-bit __kernel_old_{gid,uid}_t types for arm64
instead of using the 32-bit types provided by asm-generic.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:41:09 +01:00
Will Deacon c168870704 arm64: ptrace: change fs when passing kernel pointer to regset code
Our compat PTRACE_POKEUSR implementation simply passes the user data to
regset_copy_from_user after some simple range checking. Unfortunately,
the data in question has already been copied to the kernel stack by this
point, so the subsequent access_ok check fails and the ptrace request
returns -EFAULT. This causes problems tracing fork() with older versions
of strace.

This patch briefly changes the fs to KERNEL_DS, so that the access_ok
check passes even with a kernel address.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:57 +01:00
Catalin Marinas 2d5a5612bc arm64: Limit the CMA buffer to 32-bit if ZONE_DMA
When the CMA buffer is allocated, it is too early to know whether
devices will require ZONE_DMA memory. This patch limits the CMA buffer
to (DMA_BIT_MASK(32) + 1) if CONFIG_ZONE_DMA is enabled.

In addition, it computes the dma_to_phys(DMA_BIT_MASK(32)) before the
increment (no current functional change).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:56 +01:00
Steven Rostedt 1712ef43af arm/ftrace: fix ftrace_return_addr() to ftrace_return_address()
The clean up of CALLER_ADDR*() functions required the archs to either
use the default __builtin_return_address(X) (where X > 0) or override
it with something the arch can use. To override it, the arch would
define ftrace_return_address(x).

The arm architecture requires this to be redefined but instead of
defining ftrace_return_address(x) it defined ftrace_return_addr(x).

Fixes: eed542d696 (ftrace: Make CALLER_ADDRx macros more generic)
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:55 +01:00
Ard Biesheuvel b913a6404c arm64/crypto: improve performance of GHASH algorithm
This patches modifies the GHASH secure hash implementation to switch to a
faster, polynomial multiplication based reduction instead of one that uses
shifts and rotates.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:54 +01:00
Ard Biesheuvel 6aa8b209f5 arm64/crypto: fix data corruption bug in GHASH algorithm
This fixes a bug in the GHASH algorithm resulting in the calculated hash to be
incorrect if the input is presented in chunks whose size is not a multiple of
16 bytes.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Fixes: fdd2389457 ("arm64/crypto: GHASH secure hash using ARMv8 Crypto Extensions")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:53 +01:00
Catalin Marinas 8907272849 arm64: defconfig update for LTP
This patch adds several defconfig options required primarily by the LTP
test suite.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:52 +01:00
Paul Bolle a46ec3a14a arm64: ftrace: Fix comment typo 'CONFIG_FUNCTION_GRAPH_FP_TEST'
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:52 +01:00
Sudeep Holla 333d17e566 arm64: add ARCH_HAS_OPP to allow enabling OPP library
The Operating Performance Point (OPP) Layer library is a generic
library used by CPUFREQ and DEVFREQ. It can be enabled only on the
platforms that specify ARCH_HAS_OPP option.

This patch selects that option in order to allow ARM64 based platforms
to use OPP library.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:51 +01:00
Sudeep Holla c63c8700f7 arm64: restore alphabetic order in Kconfig
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-06-18 12:40:50 +01:00
ChiaHao 3906c2b53c arm64: Bug fix in stack alignment exception
The value of ESR has been stored into x1, and should be directly pass to
do_sp_pc_abort function, "MOV x1, x25" is an extra operation and do_sp_pc_abort
will get the wrong value of ESR.

Signed-off-by: ChiaHao <andy.jhshiu@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>
2014-06-18 12:40:36 +01:00
David Vrabel 13cd36a37a xen/grant-table: fix suspend for non-PV guests
Commit aa8532c322 (xen: refactor suspend
pre/post hooks) broke resuming PVHVM (auto-translated physmap) guests.

The gnttab_suspend() would clear the mapping for the grant table
frames, but the ->unmap_frames() call is only applicable to PV guests.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2014-06-18 10:58:01 +01:00
David Vrabel ea9f9274bf x86/xen: no need to explicitly register an NMI callback
Remove xen_enable_nmi() to fix a 64-bit guest crash when registering
the NMI callback on Xen 3.1 and earlier.

It's not needed since the NMI callback is set by a set_trap_table
hypercall (in xen_load_idt() or xen_write_idt_entry()).

It's also broken since it only set the current VCPU's callback.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
2014-06-18 10:57:41 +01:00
James Morris 70b4a2598c security: add Serge Hallyn as a maintainer
Add Serge E. Hallyn <serge@hallyn.com> as a co-maintainer of the
security subsystem, to avoid having a single point of failure
in the development process.

Signed-off-by: James Morris <james.l.morris@oracle.com>
2014-06-18 18:57:50 +10:00
Dave Airlie 571366284b Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-next
couple more DP regression fixes.
* 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/disp: fix oops in destructor with headless cards
  drm/gf117/i2c: no aux channels on this chipset
2014-06-18 15:50:58 +10:00
Maarten Lankhorst 242a42eadf drm/nouveau/disp: fix oops in destructor with headless cards
If init doesn't run then disp->outp might not be initialized, resulting
in an oops.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2014-06-18 15:49:50 +10:00
Ben Skeggs 82c2b5ed6f drm/gf117/i2c: no aux channels on this chipset
Reported-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2014-06-18 15:49:50 +10:00
Alexander Gordeev 86fb5c56cf blk-mq: bitmap tag: fix races in bt_get() function
This update fixes few issues in bt_get() function:

- list_empty(&wait.task_list) check is not protected;

- was_empty check is always true which results in *every* thread
  entering the loop resets bt_wait_state::wait_cnt counter rather
  than every bt->wake_cnt'th thread;

- 'bt_wait_state::wait_cnt' counter update is redundant, since
  it also gets reset in bt_clear_tag() function;

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-17 22:13:08 -07:00
Alexander Gordeev 2971c35f35 blk-mq: bitmap tag: fix race on blk_mq_bitmap_tags::wake_cnt
This piece of code in bt_clear_tag() function is racy:

	bs = bt_wake_ptr(bt);
	if (bs && atomic_dec_and_test(&bs->wait_cnt)) {
		atomic_set(&bs->wait_cnt, bt->wake_cnt);
 		wake_up(&bs->wait);
	}

Since nothing prevents bt_wake_ptr() from returning the very
same 'bs' address on multiple CPUs, the following scenario is
possible:

    CPU1                                CPU2
    ----                                ----

0.  bs = bt_wake_ptr(bt);               bs = bt_wake_ptr(bt);
1.  atomic_dec_and_test(&bs->wait_cnt)
2.                                      atomic_dec_and_test(&bs->wait_cnt)
3.  atomic_set(&bs->wait_cnt, bt->wake_cnt);

If the decrement in [1] yields zero then for some amount of time
the decrement in [2] results in a negative/overflow value, which
is not expected. The follow-up assignment in [3] overwrites the
invalid value with the batch value (and likely prevents the issue
from being severe) which is still incorrect and should be a lesser.

Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-17 22:13:05 -07:00
Alexander Gordeev 8537b12034 blk-mq: bitmap tag: fix races on shared ::wake_index fields
Fix racy updates of shared blk_mq_bitmap_tags::wake_index
and blk_mq_hw_ctx::wake_index fields.

Cc: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-17 22:12:35 -07:00
Jens Axboe 736ed4de76 block: blk_max_size_offset() should check ->max_sectors
Commit 762380ad93 inadvertently changed a check for max_sectors
to max_hw_sectors. Revert that part, so we still compare against
max_sectors.

Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-17 22:12:02 -07:00
Linus Torvalds e99cfa2d06 - Fix microblaze compiling due to conflicting merge window changes
- A fix in of_attach_node due to of_find_node_by_path changes
 - Prevent format strings in DT kobject names
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Merge tag 'dt-fixes-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull device tree fixes from Rob Herring:
 - fix microblaze compiling due to conflicting merge window changes
 - a fix in of_attach_node due to of_find_node_by_path changes
 - prevent format strings in DT kobject names

* tag 'dt-fixes-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  OF: fix of_find_node_by_path() assumption that of_allnodes is root
  of: avoid format string parsing in kobject names
  of/platform: Fix microblaze build failure
2014-06-17 14:25:09 -10:00
Linus Torvalds 5ee22beeb2 random: fix entropy accounting bug introduced in v3.15
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Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

Pull randomness bugfix from Ted Ts'o:
 "random: fix entropy accounting bug introduced in v3.15"

* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: fix nasty entropy accounting bug
2014-06-17 14:23:14 -10:00
Linus Torvalds 5cfb277d66 regulator: Fixes for v3.16
A few small fixes:
 
  - Fixes for bugs in Palmas and as3722 exposed by recent changes in the
    core - the drivers weren't allowing the current configuration to be
    read sometimes.
  - Provide a stub for regulator_can_change_voltage() for !REGULATOR.
  - Make sure ltc3589 only looks at its child nodes in the device tree
    rather than searching the whole tree.
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Merge tag 'regulator-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A few small fixes:

   - Fixes for bugs in Palmas and as3722 exposed by recent changes in
     the core - the drivers weren't allowing the current configuration
     to be read sometimes.
   - Provide a stub for regulator_can_change_voltage() for !REGULATOR.
   - Make sure ltc3589 only looks at its child nodes in the device tree
     rather than searching the whole tree"

* tag 'regulator-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: ltc3589: Use of_get_child_by_name
  regulator: palmas: Fix SMPS list for 0V
  regulator: add regulator_can_change_voltage stub
  regulator: as3722: Make 0 a valid selector
2014-06-17 14:21:07 -10:00
Linus Torvalds 66a521bdda spi: Fix for v3.16
A single bugfix from the merge window, fixing an issue with DMA at slow
 speeds on Intel hardware.
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Merge tag 'spi-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fix from Mark Brown:
 "A single bugfix from the merge window, fixing an issue with DMA at
  slow speeds on Intel hardware"

* tag 'spi-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi/pxa2xx: change default supported DMA burst size to 1
2014-06-17 14:20:17 -10:00
Sachin Kamat a859c8b2c3 serial: samsung: Fix build error
Fixes the following build error due to a typo introduced
by commit e4ac92df27 ("serial: samsung: Neaten dbg uses"):
drivers/tty/serial/samsung.c:69:26: error: ‘buf’ undeclared (first use in this function)

Reported-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:09:36 -07:00
Alan Stern 32b36eeae6 USB: usbtest: add a timeout for scatter-gather tests
In usbtest, tests 5 - 8 use the scatter-gather library in usbcore
without any sort of timeout.  If there's a problem in the gadget or
host controller being tested, the test can hang.

This patch adds a 10-second timeout to the tests, so that they will
fail gracefully with an ETIMEDOUT error instead of hanging.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Huang Rui <ray.huang@amd.com>
Tested-by: Huang Rui <ray.huang@amd.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:05:50 -07:00
Alan Stern b0a50e92bd USB: EHCI: avoid BIOS handover on the HASEE E200
Leandro Liptak reports that his HASEE E200 computer hangs when we ask
the BIOS to hand over control of the EHCI host controller.  This
definitely sounds like a bug in the BIOS, but at the moment there is
no way to fix it.

This patch works around the problem by avoiding the handoff whenever
the motherboard and BIOS version match those of Leandro's computer.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Leandro Liptak <leandroliptak@gmail.com>
Tested-by: Leandro Liptak <leandroliptak@gmail.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:05:49 -07:00
Dan Williams e3d1050555 usb: fix hub-port pm_runtime_enable() vs runtime pm transitions
Commit 9262c19d14 "usb: disable port power control if not supported in
wHubCharacteristics" gated enabling runtime pm for usb_port devices on
whether the parent hub supports power control, which causes a
regression.  The port must still be allowed to carry out runtime pm
callbacks and receive a -EAGAIN or -EBUSY result.  Otherwise the
usb_port device will transition to the pm error state and trigger the
same for the child usb_device.

Prior to the offending commit usb_hub_create_port_device() arranged for
runtime pm to be disabled is dev_pm_qos_expose_flags() failed.  Instead,
force the default state of PM_QOS_FLAG_NO_POWER_OFF flag to be set prior
to enabling runtime pm.  If that policy can not be set then fail
registration.

Report: http://marc.info/?l=linux-usb&m=140290586301336&w=2
Fixes: 9262c19d14 ("usb: disable port power control if not supported in wHubCharacteristics")
Reported-by: Bjørn Mork <bjorn@mork.no>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:04:39 -07:00
Dan Williams 6c79fe4afc usb: quiet peer failure warning, disable poweroff
In the case where platform firmware has specified conflicting values for
port locations it is confusing and otherwise not helpful to throw a
backtrace.  Instead, include enough information to determine that
firmware has done something wrong and globally disable port poweroff.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:04:39 -07:00
Dan Williams b658b8f5c0 usb: improve "not suspended yet" message in hub_suspend()
Reading through a recent bug report [1], Alan notes:

  "Dan, the warning message in hub_suspend() should mention that the
   child device isn't suspended yet."

...update the warning from:

  "usb usb3-port4: not suspended yet"

...to:

   "usb usb3-port4: device 3-4: not suspended yet"

[1]: http://marc.info/?l=linux-usb&m=140290586301336&w=2

Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 16:44:57 -07:00
Mathias Nyman be3de32107 xhci: Fix sleeping with IRQs disabled in xhci_stop_device()
xhci_stop_device() allocates and issues stop commands for each active endpoint.
This is done with spinlock held and interrupt disabled so we can't sleep during
memory allocation. Use GFP_NOWAIT instead

Regression from commit ddba5cd0ae
"xhci: Use command structures when queuing commands on the command ring"
for 3.16-rc1

Fixes: ddba5cd0ae ("xhci: Use command structures when queuing commands")
Reported-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 16:44:57 -07:00
Dan Williams e3d9558082 usb: fix ->update_hub_device() vs hdev->maxchild
Commit d8521afe35 "usb: assign default peer ports for root hubs"
delayed marking a hub valid (set hdev->maxchild) until it had been fully
configured and to enable the publishing of valid hubs to be serialized
by usb_port_peer_mutex.

However, xhci_update_hub_device() in some cases depends on
hdev->maxchild already being set.  Do the minimal fix and move it after
the setting of hdev->maxchild.

Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Tested-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 16:44:57 -07:00
Greg Kroah-Hartman b29f680c4f Revert "uio: fix vma io range check in mmap"
This reverts commit ddb09754e6.

Linus objected to this originally, I can see why it might be needed, but
given that no one spoke up defending this patch, I'm going to revert it.

If you have hardware that requires this change, please speak up in the
future and defend the patch.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Bin Wang <binw@marvell.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Norbert Ciosek <norbertciosek@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 16:07:08 -07:00
Jes Sorensen c44b33b721 staging: rtl8723au: Reference correct firmwarefiles with MODULE_FIRMWARE()
Add missing firmware references, and request the correct one.

Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 15:39:33 -07:00
Jes Sorensen 68b7a12047 staging: rtl8723au: Request correct firmware file for A-cut parts
The filename requested by the driver didn't match what we had sitting
in /lib/firmware/

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 15:39:33 -07:00
Doug Smythies 51d211e9c3 intel_pstate: Correct rounding in busy calculation
There was a mistake in the actual rounding portion this previous patch:
f0fe3cd7e1 (intel_pstate: Correct rounding in busy calculation) such that
the rounding was asymetric and incorrect.

Severity: Not very serious, but can increase target pstate by one extra value.
For real world work flows the issue should self correct (but I have no proof).
It is the equivalent of different PID gains for positive and negative numbers.

Examples:
 -3.000000 used to round to -4, rounds to -3 with this patch.
 -3.503906 used to round to -5, rounds to -4 with this patch.

Fixes: f0fe3cd7e1 (intel_pstate: Correct rounding in busy calculation)
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-06-17 22:57:40 +02:00
Kinglong Mee f41c5ad2ff NFSD: fix bug for readdir of pseudofs
Commit 561f0ed498 (nfsd4: allow large readdirs) introduces a bug
about readdir the root of pseudofs.

Call xdr_truncate_encode() revert encoded name when skipping.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-06-17 16:42:48 -04:00
NeilBrown 6282cd5655 NFSD: Don't hand out delegations for 30 seconds after recalling them.
If nfsd needs to recall a delegation for some reason it implies that there is
contention on the file, so further delegations should not be handed out.

The current code fails to do so, and the result is effectively a
live-lock under some workloads: a client attempting a conflicting
operation on a read-delegated file receives NFS4ERR_DELAY and retries
the operation, but by the time it retries the server may already have
given out another delegation.

We could simply avoid delegations for (say) 30 seconds after any recall, but
this is probably too heavy handed.

We could keep a list of inodes (or inode numbers or filehandles) for recalled
delegations, but that requires memory allocation and searching.

The approach taken here is to use a bloom filter to record the filehandles
which are currently blocked from delegation, and to accept the cost of a few
false positives.

We have 2 bloom filters, each of which is valid for 30 seconds.   When a
delegation is recalled the filehandle is added to one filter and will remain
disabled for between 30 and 60 seconds.

We keep a count of the number of filehandles that have been added, so when
that count is zero we can bypass all other tests.

The bloom filters have 256 bits and 3 hash functions.  This should allow a
couple of dozen blocked  filehandles with minimal false positives.  If many
more filehandles are all blocked at once, behaviour will degrade towards
rejecting all delegations for between 30 and 60 seconds, then resetting and
allowing new delegations.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-06-17 16:42:47 -04:00
Rob Herring 21278aeafb ARM: use menuconfig for sub-arch menus
The System Type menu is getting quite long with platforms and is
inconsistent in handling of sub-arch specific options. Tidy up the menu
by making platform options a menuconfig entry containing any platform
specific config items.

[arnd: change OMAP part according to suggestion from
 Tony Lindgren <tony@atomide.com>]

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:48 +02:00
Stephen Warren 216e9d3e8b ARM: multi_v7_defconfig: re-enable SDHCI drivers
Following 5d01b7684b "mmc: simplify SDHCI Kconfig dependencies",
SDHCI drivers that use MMC_SDHCI_PLTFM no longer select it, but
instead depend on it. This means that multi_v7_defconfig no longer
selects it, and hence many SDHCI drivers are no longer enabled.
Explicitly enable MMC_SDHCI_PLTFM to solve this.

Fixes: 5d01b7684b ("mmc: simplify SDHCI Kconfig dependencies")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:47 +02:00
Sachin Kamat 3eb9364656 ARM: EXYNOS: Fix compilation warning
of_get_flat_dt_prop return type is now const.
Fixes the following compilation warning introduced by commit 9d0c4dfedd
("of/fdt: update of_get_flat_dt_prop in prep for libfdt")

arch/arm/mach-exynos/exynos.c:259:6: warning:
assignment discards ‘const’ qualifier from pointer target type [enabled by default]

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: Tushar Behera <tushar.behera@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:46 +02:00
Olof Johansson 1754c42e3d ARM: exynos: move sysram info to exynos.c
This solves a problem with building with CONFIG_SMP=n due to missing
sysram_base_addr (or sysram_ns_base_addr) variables.

The new setup method is more awkward than I'd like for it to be, but
it can't be done in init_early() since ioremap is not yet available,
but it needs to happen before SMP.

Reported-by: Russell King <linux@arm.linux.org.uk>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:45 +02:00
Ezequiel Garcia 1ad58443cf ARM: dts: Specify the NAND ECC scheme explicitly on Armada 385 DB board
The factory bootloader on A385-DB boards expect the ECC strength to be
4 bits over 512 bytes. Hence, we need to specify this in the devicetree,
to prevent the kernel from assuming any different ECC scheme.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1400941030-2123-3-git-send-email-ezequiel.garcia@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-06-17 17:09:45 +02:00
Ezequiel Garcia 3364ee57ae ARM: dts: Specify the NAND ECC scheme explicitly on Armada 375 DB board
The factory bootloader on A375-DB boards expect the ECC strength to be
4 bits over 512 bytes. Hence, we need to specify this in the devicetree,
to prevent the kernel from assuming any different ECC scheme.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1400941030-2123-2-git-send-email-ezequiel.garcia@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-06-17 17:09:43 +02:00
Rob Herring e509b289f7 ARM: exynos: cleanup kconfig option display
The addition of Exynos to multi-platform configs creates a mess of config
options with options appearing before the Exynos config option. This is
due to arch/arm/plat-samsung/Kconfig being included out of order with the
other Samsung platform kconfig files. Reorder the kconfig files and move
all the options into a sub-menu. Some of the options are dead, so remove
those as well.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:41 +02:00
Dan Carpenter fc96e661a5 misc: vexpress: fix error handling vexpress_syscfg_regmap_init()
This function should be returning an ERR_PTR() on failure instead of
NULL.  Also there is a use after free bug if regmap_init() fails because
we free "func" and then dereference doing the return.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:40 +02:00
Stephen Boyd 19682f72f5 ARM: Remove ARCH_HAS_CPUFREQ config option
This config exists entirely to hide the cpufreq menu from the
kernel configuration unless a platform has selected it. Nothing
is actually built if this config is 'Y' and it just leads to more
patches that add a select under a platform Kconfig so that some
other CPUfreq option can be chosen. Let's remove the option so
that we can always enable CPUfreq drivers on ARM platforms.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-06-17 17:09:39 +02:00