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27667f4744
linux/drivers
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Linus Torvalds 27667f4744 i915: temporary fix for DP MST docking station NULL pointer dereference 
Ted Ts'o reports that his Lenovo T540p ThinkPad crashes at boot if
attached to the docking station.  This is a regression that he was able
to bisect to commit 8c7b5ccb72: "drm/i915: Use atomic helpers for
computing changed flags:"

The reason seems to be the new call to drm_atomic_helper_check_modeset()
added to intel_modeset_compute_config(), which in turn calls
update_connector_routing(), and somehow ends up picking a NULL crtc for
the connector state, causing the subsequent drm_crtc_index() to OOPS.

Daniel Vetter says that the fundamental issue seems to be confusion in
the encoder selection, and this isn't the right fix, but while he chases
down the proper fix, this at least avoids the NULL pointer dereference
and makes Ted's docking station work again.

Reported-bisected-and-tested-by: Theodore Ts'o <tytso@mit.edu>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Mani Nikula <jani.nikula@linux.intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-08-02 11:02:16 -07:00
..
accessibility
acpi ACPI / PM: Use target_state to set the device power state 2015-07-28 16:29:08 +02:00
amba
android
ata Merge branch 'for-4.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-07-24 16:54:59 -07:00
atm atm: idt77105: Use setup_timer 2015-06-10 22:46:34 -07:00
auxdisplay
base Fix firmware loader uevent buffer NULL pointer dereference 2015-07-09 11:20:01 -07:00
bcma
block null_blk: fix use-after-free problem 2015-07-22 13:30:20 -06:00
bluetooth Bluetooth: btbcm: allow btbcm_read_verbose_config to fail on Apple 2015-07-14 22:54:55 +02:00
bus ARM: SoC: driver updates for v4.2 2015-06-26 11:54:29 -07:00
cdrom
char Merge tag 'tpm-fixes-for-4.2-rc2' of https://github.com/PeterHuewe/linux-tpmdd into for-linus 2015-07-15 21:46:59 +10:00
clk Update Viresh Kumar's email address 2015-07-17 16:39:53 -07:00
clocksource clocksource/imx: Define clocksource for mx27 2015-07-07 10:44:45 +02:00
connector
cpufreq cpufreq: Avoid attempts to create duplicate symbolic links 2015-07-28 17:19:26 +02:00
cpuidle suspend-to-idle: Prevent RCU from complaining about tick_freeze() 2015-07-09 22:59:49 +02:00
crypto crypto: nx - Fix reentrancy bugs 2015-07-08 15:14:13 +08:00
dca
devfreq
dio
dma dmaengine fixes for 4.2-rc5 2015-08-01 12:47:04 -07:00
dma-buf
edac A build fix for octeon_edac from Aaro Koskinen. 2015-07-03 12:10:12 -07:00
eisa
extcon extcon: Redefine the unique id of supported external connectors without 'enum extcon' type 2015-06-12 17:01:42 -07:00
firewire
firmware efi: Check for NULL efi kernel parameters 2015-07-30 18:07:11 +01:00
fmc
gpio Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-18 10:27:12 -07:00
gpu i915: temporary fix for DP MST docking station NULL pointer dereference 2015-08-02 11:02:16 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-07-30 11:03:04 -07:00
hsi Fix up implicit <module.h> users that will break later. 2015-07-02 10:25:22 -07:00
hv Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion 2015-06-12 16:58:33 -07:00
hwmon hwmon: (nct7802) Fix integer overflow seen when writing voltage limits 2015-07-29 20:06:50 -07:00
hwspinlock hwspinlock: qcom: Correct msb in regmap_field 2015-07-01 16:15:05 +03:00
hwtracing/coresight
i2c i2c: Mark instantiated device nodes with OF_POPULATE 2015-07-09 22:25:54 +02:00
ide Minor merge needed, due to function move. 2015-07-01 10:49:25 -07:00
idle
iio iio:light:stk3310: make endianness independent of host 2015-07-19 14:54:45 +01:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-07-29 09:54:40 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-07-30 11:03:04 -07:00
iommu iommu/amd: Allow non-ATS devices in IOMMUv2 domains 2015-07-31 15:15:41 +02:00
ipack
irqchip Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-18 10:27:12 -07:00
isdn isdn/gigaset: drop unused ldisc methods 2015-07-15 17:24:45 -07:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2015-07-01 19:09:11 -07:00
lguest Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-06-22 17:59:09 -07:00
macintosh macintosh/nvram: Remove as unused 2015-06-15 16:42:37 +10:00
mailbox Replace module_init with appropriate alternate initcall in non modules. 2015-07-02 10:36:29 -07:00
mcb
md dm cache: fix device destroy hang due to improper prealloc_used accounting 2015-07-29 14:32:09 -04:00
media x86/mm/pat, drivers/media/ivtv: Move the PAT warning and replace WARN() with pr_warn() 2015-07-21 09:42:54 +02:00
memory Merge branch 'fixes-rc1' into omap-for-v4.2/fixes 2015-07-06 05:33:17 -07:00
memstick memstick: remove deprecated use of pci api 2015-06-30 19:44:57 -07:00
message fusion: remove dead MTRR code 2015-06-13 08:44:14 -07:00
mfd Update Viresh Kumar's email address 2015-07-17 16:39:53 -07:00
misc mei: prevent unloading mei hw modules while the device is opened. 2015-07-22 21:31:05 -07:00
mmc mmc: sdhci-pxav3: fix platform_data is not initialized 2015-07-24 10:18:39 +02:00
mtd Minor merge needed, due to function move. 2015-07-01 10:49:25 -07:00
net stmmac: fix missing MODULE_LICENSE in stmmac_platform 2015-07-31 15:44:24 -07:00
nfc Char/Misc driver patches for 4.2-rc1 2015-06-26 14:51:15 -07:00
ntb NTB: Add split BAR output for debugfs stats 2015-07-04 14:09:32 -04:00
nubus
nvdimm libnvdimm: fix namespace seed creation 2015-07-25 09:57:56 -07:00
of of: Drop owner assignment from platform and i2c driver 2015-07-27 08:24:39 -05:00
oprofile
parisc
parport parport: Revert "parport: fix memory leak" 2015-07-25 12:48:05 -07:00
pci Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
pcmcia Fix up implicit <module.h> users that will break later. 2015-07-02 10:25:22 -07:00
phy phy: berlin-usb: fix divider for BG2 2015-07-15 20:02:09 +05:30
pinctrl Pin control fixes for the v4.2 series: 2015-07-21 15:27:27 -07:00
platform intel_scu_ipc: move local memory initialization out of a mutex 2015-07-14 11:02:44 -07:00
pnp ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage 2015-07-06 23:52:21 +02:00
power Replace module_platform_driver with builtin_platform driver in non modules. 2015-07-02 10:42:13 -07:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v4.2-rc1 2015-06-23 13:32:38 -07:00
rapidio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-06-23 14:08:54 -07:00
ras
regulator Merge remote-tracking branches 'regulator/fix/88pm800', 'regulator/fix/max8973', 'regulator/fix/s2mps11' and 'regulator/fix/supply' into regulator-linus 2015-07-24 16:19:25 +01:00
remoteproc remoteproc: fix !CONFIG_OF build breakage 2015-06-18 11:44:41 +03:00
reset
rpmsg
rtc rtc: armada38x: Remove unused variable from armada38x_rtc_set_time() 2015-07-18 00:42:31 +02:00
s390 virtio/vhost: fixes for 4.2 2015-07-23 13:07:04 -07:00
sbus
scsi SCSI fixes on 20150802 2015-08-02 09:36:21 -07:00
sfi
sh Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
sn
soc ARM: SoC: late fixes and dependencies 2015-07-02 14:40:49 -07:00
spi Merge remote-tracking branches 'spi/fix/gqspi', 'spi/fix/imx', 'spi/fix/mg-spfi' and 'spi/fix/spidev' into spi-linus 2015-07-24 16:19:50 +01:00
spmi
ssb
staging staging: vt6656: check ieee80211_bss_conf bssid not NULL 2015-07-19 11:48:19 +01:00
target iscsi-target: Fix iser explicit logout TX kthread leak 2015-07-24 14:19:44 -07:00
tc
thermal Minor merge needed, due to function move. 2015-07-01 10:49:25 -07:00
thunderbolt
tty tty: vt: Fix !TASK_RUNNING diagnostic warning from paste_selection() 2015-07-23 18:08:29 -07:00
uio uio: pruss: Drop depends on ARCH_DAVINCI_DA850 from config 2015-06-12 17:01:43 -07:00
usb USB: OHCI: fix bad #define in ohci-tmio.c 2015-07-22 14:49:42 -07:00
uwb
vfio vfio: Fix lockdep issue 2015-07-24 15:14:04 -06:00
vhost vhost: fix error handling for memory region alloc 2015-07-27 18:05:05 +03:00
video stifb: Implement hardware accelerated copyarea 2015-07-10 21:44:19 +02:00
virt
virtio virtio/vhost: cross endian support 2015-07-03 16:02:25 -07:00
vlynq
vme vme: tsi148: depend on HAS_DMA for Kconfig 2015-06-12 17:31:05 -07:00
w1 w1: use correct lock on error in w1_seq_show() 2015-06-12 16:58:33 -07:00
watchdog Update Viresh Kumar's email address 2015-07-17 16:39:53 -07:00
xen Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-07-04 14:13:43 -07:00
zorro
Kconfig libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support 2015-06-24 21:24:10 -04:00
Makefile The libnvdimm sub-system introduces, in addition to the libnvdimm-core, 2015-06-29 10:34:42 -07:00