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Imre Deak 6323751d28 drm/i915: fix HPD IRQ reenable work cancelation 
Atm, the HPD IRQ reenable timer can get rearmed right after it's
canceled. Also to access the HPD IRQ mask registers we need to wake up
the HW.

Solve both issues by converting the reenable timer to a delayed work and
grabbing a runtime PM reference in the work. By this we can also forgo
canceling the timer during runtime suspend, since the only important
thing there is that the HW is awake when we write the registers and
that's ensured by the RPM ref. So do the cancelation only during driver
unload time; this is also a requirement for an upcoming patch where we
want to cancel all HPD related works only during system suspend and
driver unload time, but not during runtime suspend.

Note that there is still a race between the HPD IRQ reenable work and
drm_irq_uninstall() during driver unload, where the work can reenable
the HPD IRQs disabled by drm_irq_uninstall(). This isn't a problem since
the HPD IRQs will still be effectively masked by the first level
interrupt mask.

v2-3:
- unchanged
v4:
- use proper API for changing the expiration time for an already pending
  delayed work (Jani)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v2)
Cc: stable@vger.kernel.org (3.16+)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
 		2014-08-18 16:16:00 +03:00
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accessibility
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acpi More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
amba
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ata Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-13 18:27:40 -06:00
auxdisplay
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base Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
bcma bcma: use NS prefix for names of Northstar specific cores 2014-07-31 13:45:32 -04:00
block PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
bluetooth Bluetooth: Fix crash in the Marvell driver initialization codepath 2014-07-31 01:07:28 +02:00
bus ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
cdrom
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char virtio: rng: add derating factor for use by hwrng core 2014-08-15 10:26:01 +05:30
clk ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
clocksource ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
connector
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cpufreq More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
cpuidle More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
crypto PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
dca
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devfreq
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dio
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dma Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
dma-buf
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edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2014-08-15 17:56:45 -06:00
eisa
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extcon
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firewire Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
firmware kexec: support kexec/kdump on EFI systems 2014-08-08 15:57:33 -07:00
fmc
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gpio This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
gpu drm/i915: fix HPD IRQ reenable work cancelation 2014-08-18 16:16:00 +03:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-08-15 18:16:28 -06:00
hsi HSI changes for the v3.17 series 2014-08-06 20:06:14 -07:00
hv Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
hwmon Several bug fixes in various drivers, plus a minor cleanup 2014-08-14 09:55:13 -06:00
hwspinlock
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i2c Merge branch 'i2c/for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2014-08-09 09:15:07 -07:00
ide ide: use module_platform_driver() 2014-08-05 21:16:46 -07:00
idle intel_idle: Broadwell support 2014-08-15 17:06:40 -04:00
iio Staging driver patches for 3.17-rc1 2014-08-04 18:36:12 -07:00
infiniband PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-08-15 18:16:28 -06:00
iommu ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
ipack
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irqchip ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
isdn net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
leds ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
lguest mm/vmalloc.c: clean up map_vm_area third argument 2014-08-06 18:01:19 -07:00
macintosh == Changes to existing drivers == 2014-08-07 17:23:16 -07:00
mailbox
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mcb
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md . Allow the thin target to paired with any size external origin; also 2014-08-14 09:17:56 -06:00
media media: use pci_zalloc_consistent 2014-08-08 15:57:28 -07:00
memory
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memstick
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message
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mfd drivers/mfd/rtsx_usb.c: export device table 2014-08-14 10:56:15 -06:00
misc ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
mmc PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
mtd No significant changes, mostly small fixes here and there. The more important 2014-08-13 17:42:11 -06:00
net PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
nfc
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ntb
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nubus
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of The branch contains the following device tree changes the v3.17 merge 2014-08-14 09:53:39 -06:00
oprofile
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parisc
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parport drivers/parport/parport_ip32.c: use PTR_ERR_OR_ZERO 2014-08-08 15:57:25 -07:00
pci PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
pcmcia Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
phy ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
pinctrl ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
platform platform/x86: Enable build support for toshiba_haps 2014-08-16 01:23:56 -07:00
pnp
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power ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
powercap
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pps
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ps3
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ptp PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
pwm pwm: Changes for v3.17-rc1 2014-08-08 18:06:29 -07:00
rapidio PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
ras
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regulator == Changes to existing drivers == 2014-08-07 17:17:39 -07:00
remoteproc
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reset
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rpmsg
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rtc Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-08-07 08:41:00 -07:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-08-05 18:57:18 -07:00
scsi SCSI misc on 20140815 2014-08-15 18:28:58 -06:00
sfi
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sh
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sn
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soc
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spi ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
spmi
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ssb
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staging Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
target SCSI misc on 20140806 2014-08-06 20:10:32 -07:00
tc
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thermal
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thunderbolt
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tty The branch contains the following device tree changes the v3.17 merge 2014-08-14 09:53:39 -06:00
uio
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usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
uwb uwb/whci: use correct structure type name in sizeof 2014-08-01 15:48:08 -07:00
vfio drivers/vfio: Enable VFIO if EEH is not supported 2014-08-08 10:39:16 -06:00
vhost
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video PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
virt
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virtio
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vlynq
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vme vme: bridges: use pci_zalloc_consistent 2014-08-08 15:57:30 -07:00
w1
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watchdog Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
xen PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
zorro
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Kconfig Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
Makefile Driver core patches for 3.17-rc1 2014-08-04 18:34:04 -07:00