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linux-uconsole/drivers
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Chris Wilson 8bc91b60f7 drm/i915: Serialize almost all register access 
commit a7cd1b8fea upstream.

In theory, the different register blocks were meant to be only ever
touched when holding either the struct_mutex, mode_config.lock or even a
specific localised lock. This does not seem to be the case, and the
hardware reacts extremely badly if we attempt to concurrently access two
registers within the same cacheline.

The HSD suggests that we only need to do this workaround for display
range registers. However, upon review we need to serialize the multiple
stages in our register write functions - if only for preemption
protection.

Irrespective of the hardware requirements, the current io functions are
a little too loose with respect to the combination of pre- and
post-condition testing that we do in conjunction with the actual io. As
a result, we may be pre-empted and generate both false-postive and
false-negative errors.

Note well that this is a "90%" solution, there remains a few direct
users of ioread/iowrite which will be fixed up in the next few patches.
Since they are more invasive and that this simple change will prevent
almost all lockups on Haswell, we kept this patch simple to facilitate
backporting to stable.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=63914
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04 16:51:11 +08:00
..
accessibility
acpi ACPI / video: ignore BIOS initial backlight value for Fujitsu E753 2013-08-04 16:51:02 +08:00
amba
ata libata: make it clear that sata_inic162x is experimental 2013-08-04 16:50:55 +08:00
atm
auxdisplay
base regmap: cache: bail in regmap_async_complete() for bus-less maps 2013-08-04 16:50:58 +08:00
bcma bcma: add more core IDs 2013-05-17 14:31:05 -04:00
block xen/blkback: Check device permissions before allowing OP_DISCARD 2013-08-04 16:50:53 +08:00
bluetooth Bluetooth: btmrvl: fix thread stopping race 2013-06-13 13:05:40 -04:00
bus
cdrom drivers/cdrom/cdrom.c: use kzalloc() for failing hardware 2013-07-13 11:42:26 -07:00
char random: fix accounting race condition with lockless irq entropy_count update 2013-05-24 16:22:52 -07:00
clk ARM: tegra30: clocks: Fix pciex clock registration 2013-06-16 11:25:45 -07:00
clocksource clocksource: dw_apb: Fix error check 2013-07-25 14:07:29 -07:00
connector
cpufreq cpufreq / intel_pstate: Change to scale off of max P-state 2013-08-04 16:50:51 +08:00
cpuidle
crypto crypto: caam - Fixed the memory out of bound overwrite issue 2013-08-04 16:50:57 +08:00
dca
devfreq
dio
dma drivers/dma/pl330.c: fix locking in pl330_free_chan_resources() 2013-07-21 18:21:35 -07:00
edac EDAC: Fix lockdep splat 2013-07-28 16:30:11 -07:00
eisa
extcon Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
firewire firewire: fix libdc1394/FlyCap2 iso event regression 2013-08-04 16:50:38 +08:00
firmware efivar: fix oops in efivar_update_sysfs_entries() caused by memory reuse 2013-05-13 20:20:02 +01:00
gpio gpio/omap: don't use linear domain mapping for OMAP1 2013-06-25 23:13:40 -07:00
gpu drm/i915: Serialize almost all register access 2013-08-04 16:51:11 +08:00
hid HID: apple: Add support for the 2013 Macbook Air 2013-07-21 18:21:29 -07:00
hsi
hv Drivers: hv: balloon: Do not post pressure status if interrupted 2013-08-04 16:50:58 +08:00
hwmon hwmon: (nct6775) Drop unsupported fan alarm attributes for NCT6775 2013-07-25 14:07:27 -07:00
hwspinlock
i2c i2c-piix4: Add AMD CZ SMBus device ID 2013-07-25 14:07:28 -07:00
ide
idle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2013-05-11 15:23:17 -07:00
iio iio: inkern: fix iio_convert_raw_to_processed_unlocked 2013-07-25 14:07:23 -07:00
infiniband iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser 2013-08-04 16:50:34 +08:00
input Input: bcm5974 - add support for the 2013 MacBook Air 2013-07-21 18:21:29 -07:00
iommu iommu/amd: Only unmap large pages from the first pte 2013-07-25 14:07:42 -07:00
ipack
irqchip ARM: SoC fixes for 3.10-rc 2013-06-22 09:44:45 -10:00
isdn isdn/kcapi: fix a small underflow 2013-05-20 13:38:14 -07:00
leds drivers/leds/leds-ot200.c: fix error caused by shifted mask 2013-05-24 16:22:51 -07:00
lguest
macintosh
mailbox
md dm verity: fix inability to use a few specific devices sizes 2013-08-04 16:51:02 +08:00
media media: dmxdev: remove dvb_ringbuffer_flush() on writer side 2013-07-28 16:30:21 -07:00
memory drivers/memory: don't check resource with devm_ioremap_resource 2013-05-18 11:55:52 +02:00
memstick
message
mfd mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
misc Char / Misc fixes for 3.10-rc6 2013-06-14 19:15:36 -10:00
mmc mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case 2013-05-26 14:23:11 -04:00
mtd drivers/mtd/nand: don't check resource with devm_ioremap_resource 2013-05-18 11:55:55 +02:00
net xen-netfront: pull on receive skb may need to happen earlier 2013-08-04 16:50:53 +08:00
nfc NFC: mei: Do not disable MEI devices from their remove routine 2013-05-21 10:48:41 +02:00
ntb NTB: Multiple NTB client fix 2013-05-15 10:58:22 -07:00
nubus
of of: Fix address decoding on Bimini and js2x machines 2013-07-25 14:07:32 -07:00
oprofile
parisc parisc: fix LMMIO mismatch between PAT length and MASK register 2013-07-21 18:21:26 -07:00
parport parisc: parport0: fix this legacy no-device port driver! 2013-06-01 14:46:42 +02:00
pci ahci: Add AMD CZ SATA device ID 2013-07-21 18:21:30 -07:00
pcmcia pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status 2013-07-21 18:21:25 -07:00
pinctrl Renesas ARM based SoC fixes for v3.10 2013-06-07 18:11:02 -07:00
platform x86 / platform / hp_wmi: Fix bluetooth_rfkill misuse in hp_wmi_rfkill_setup() 2013-06-01 23:51:48 +02:00
pnp
power charger-manager: Ensure event is not used as format string 2013-07-13 11:42:26 -07:00
pps
ps3
ptp ptp_pch: fix error handling in pch_probe() 2013-05-25 21:24:15 -07:00
pwm drivers/pwm: don't check resource with devm_ioremap_resource 2013-05-18 11:55:58 +02:00
rapidio RAPIDIO: IDT_GEN2: Fix build error. 2013-07-28 16:30:07 -07:00
regulator mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-rv3029c2.c: fix disabling AIE irq 2013-07-21 18:21:28 -07:00
s390 SCSI: zfcp: status read buffers on first adapter open with link down 2013-07-25 14:07:30 -07:00
sbus
scsi SCSI: qla2xxx: Properly set the tagging for commands. 2013-08-04 16:50:41 +08:00
sfi
sh
sn
spi Merge remote-tracking branch 'spi/fix/s3c64xx' into spi-linus 2013-06-24 12:28:29 +01:00
ssb - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
ssbi
staging staging: android: logger: Correct write offset reset on error 2013-08-04 16:50:51 +08:00
target iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser 2013-08-04 16:50:34 +08:00
tc
thermal drivers/thermal: don't check resource with devm_ioremap_resource 2013-05-18 11:57:30 +02:00
tty pch_uart: Add uart_clk selection for the MinnowBoard 2013-07-21 18:21:23 -07:00
uio uio: UIO_DMEM_GENIRQ should depend on HAS_DMA 2013-05-21 10:13:23 -07:00
usb USB: global suspend and remote wakeup don't mix 2013-08-04 16:50:50 +08:00
uwb
vfio vfio: fix crash on rmmod 2013-06-05 08:54:16 -06:00
vhost vhost-net: fix use-after-free in vhost_net_flush 2013-07-28 16:29:57 -07:00
video atmel_lcdfb: blank the backlight on remove 2013-06-01 03:18:55 +08:00
virt
virtio virtio: support unlocked queue poll 2013-07-28 16:29:55 -07:00
vlynq
vme
w1 drivers/w1/masters: don't check resource with devm_ioremap_resource 2013-05-18 11:58:03 +02:00
watchdog drivers/watchdog: don't check resource with devm_ioremap_resource 2013-05-18 11:58:04 +02:00
xen xen/tmem: Don't over-write tmem_frontswap_poolid after tmem_frontswap_init set it. 2013-06-10 10:14:33 -04:00
zorro
Kconfig
Makefile