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Maarten Lankhorst 81e257e964 drm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx 
Atomic updates may acquire more state than initially locked through
drm_modeset_lock_crtc, running with heavy stress can cause a
WARN_ON(crtc->acquire_ctx) in drm_modeset_lock_crtc:

[  601.491296] ------------[ cut here ]------------
[  601.491366] WARNING: CPU: 0 PID: 2411 at
drivers/gpu/drm/drm_modeset_lock.c:191 drm_modeset_lock_crtc+0xeb/0xf0 [drm]
[  601.491369] Modules linked in: drm i915 drm_kms_helper
[  601.491414] CPU: 0 PID: 2411 Comm: kms_cursor_lega Tainted: G     U 4.7.0-rc4-patser+ #4798
[  601.491417] Hardware name: Intel Corporation Skylake Client
[  601.491420]  0000000000000000 ffff88044d153c98 ffffffff812ead28 0000000000000000
[  601.491425]  0000000000000000 ffff88044d153cd8 ffffffff810868e6 000000bf58058030
[  601.491431]  ffff880088b415e8 ffff880458058030 ffff88008a271548 ffff88008a271568
[  601.491436] Call Trace:
[  601.491443]  [<ffffffff812ead28>] dump_stack+0x4d/0x65
[  601.491447]  [<ffffffff810868e6>] __warn+0xc6/0xe0
[  601.491452]  [<ffffffff81086968>] warn_slowpath_null+0x18/0x20
[  601.491472]  [<ffffffffc00d4ffb>] drm_modeset_lock_crtc+0xeb/0xf0 [drm]
[  601.491491]  [<ffffffffc00c5526>] drm_mode_cursor_common+0x66/0x180 [drm]
[  601.491509]  [<ffffffffc00c91cc>] drm_mode_cursor_ioctl+0x3c/0x40 [drm]
[  601.491524]  [<ffffffffc00bc94d>] drm_ioctl+0x14d/0x530 [drm]
[  601.491540]  [<ffffffffc00c9190>] ? drm_mode_setcrtc+0x520/0x520 [drm]
[  601.491545]  [<ffffffff81176aeb>] ? handle_mm_fault+0x106b/0x1430
[  601.491550]  [<ffffffff81108441>] ? stop_one_cpu+0x61/0x70
[  601.491556]  [<ffffffff811bb71d>] do_vfs_ioctl+0x8d/0x570
[  601.491560]  [<ffffffff81290d7e>] ? security_file_ioctl+0x3e/0x60
[  601.491565]  [<ffffffff811bbc74>] SyS_ioctl+0x74/0x80
[  601.491571]  [<ffffffff810e321c>] ? posix_get_monotonic_raw+0xc/0x10
[  601.491576]  [<ffffffff8175b11b>] entry_SYSCALL_64_fastpath+0x13/0x8f
[  601.491581] ---[ end trace 56f3d3d85f000d00 ]---

For good measure, test mode_config.acquire_ctx too, although this should
never happen.

Testcase: kms_cursor_legacy
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
 		2016-06-24 11:10:36 +10:00
..
accessibility
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acpi Merge branch 'acpica-fixes' 2016-06-18 01:55:55 +02:00
amba ARM: 8566/1: drivers: amba: properly handle devices with power domains 2016-05-05 19:00:40 +01:00
android
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ata remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
atm atm: iphase: off by one in rx_pkt() 2016-05-31 11:52:59 -07:00
auxdisplay
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base Driver core fixes for 4.7-rc4 2016-06-18 06:04:01 -10:00
bcma MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
block Merge branch 'stable/for-jens-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus 2016-06-09 09:49:55 -06:00
bluetooth Bluetooth: Add USB ID 13D3:3487 to ath3k 2016-05-13 16:54:59 +02:00
bus Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-05-19 10:02:26 -07:00
cdrom
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char ipmi: Remove smi_msg from waiting_rcv_msgs list before handle_one_recv_msg() 2016-06-13 08:56:28 -05:00
clk clk: nxp: Select MFD_SYSCON for creg driver 2016-06-01 15:14:06 -07:00
clocksource Small release overall. 2016-05-19 11:27:09 -07:00
connector
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cpufreq cpufreq: intel_pstate: Adjust _PSS[0] freqeuency if needed 2016-06-15 01:56:47 +02:00
cpuidle cpuidle: Fix cpuidle_state_is_coupled() argument in cpuidle_enter() 2016-05-18 02:48:37 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-05-30 15:20:18 -07:00
dax /dev/dax, core: file operations and dax-mmap 2016-05-20 22:02:55 -07:00
dca
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devfreq
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dio
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dma dmaengine: mv_xor: Fix incorrect offset in dma_map_page() 2016-06-07 12:44:23 +05:30
dma-buf dma-buf: use vma_pages() 2016-05-31 22:17:05 +05:30
edac EDAC, sb_edac: Readd accidentally dropped Broadwell-D support 2016-06-03 17:28:21 +02:00
eisa
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extcon extcon: palmas: Fix boot up state of VBUS when using GPIO detection 2016-06-15 17:17:22 +09:00
firewire treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
firmware efi/arm: Fix the format of EFI debug messages 2016-06-03 09:57:36 +02:00
fmc
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fpga
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gpio gpio: Allow PC/104 devices on X86_64 2016-06-17 20:21:12 -07:00
gpu drm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx 2016-06-24 11:10:36 +10:00
hid HID: multitouch: Add MT_QUIRK_NOT_SEEN_MEANS_UP to Surface Pro 3 2016-06-01 16:03:28 +02:00
hsi HSI: omap-ssi: move omap_ssi_port_update_fclk 2016-05-09 22:45:18 +02:00
hv
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hwmon hwmon: (lm90) use proper type for update_interval 2016-06-07 20:13:05 -07:00
hwspinlock drivers/hwspinlock: use correct radix tree API 2016-05-20 17:58:30 -07:00
hwtracing coresight: Handle build path error 2016-06-16 00:13:06 -07:00
i2c i2c: mux: reg: Provide of_match_table 2016-06-09 22:38:16 +02:00
ide
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idle
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iio Staging fixes for 4.7-rc4 2016-06-18 06:05:28 -10:00
infiniband IB/IPoIB: Don't update neigh validity for unresolved entries 2016-06-07 10:49:48 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-05-27 19:14:35 -07:00
iommu iommu/vt-d: Enable QI on all IOMMUs before setting root entry 2016-06-17 11:29:48 +02:00
ipack
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irqchip irqchip/irq-pic32-evic: Fix bug with external interrupts. 2016-06-02 18:03:50 +01:00
isdn TTY and Serial driver update for 4.7-rc1 2016-05-20 20:57:27 -07:00
leds leds: handle suspend/resume in heartbeat trigger 2016-06-08 11:47:06 +02:00
lguest
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lightnvm lightnvm: reserved space calculation incorrect 2016-05-06 12:51:10 -06:00
macintosh
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mailbox mailbox: Fix devm_ioremap_resource error detection code 2016-05-08 22:44:46 +05:30
mcb mcb: Acquire reference to carrier module in core 2016-06-13 18:49:30 -07:00
md Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-05-27 14:28:09 -07:00
media Update my main e-mails at the Kernel tree 2016-06-15 15:35:37 -10:00
memory memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing 2016-06-16 11:43:48 +03:00
memstick drivers/memstick/core/mspro_block: use kmemdup 2016-05-23 17:04:14 -07:00
message SCSI misc on 20160517 2016-05-18 16:38:59 -07:00
mfd remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
misc mei: don't use wake_up_interruptible for wr_ctrl 2016-06-10 22:14:24 -07:00
mmc mmc: sunxi: Re-enable eMMC HS-DDR modes on Allwinner A80 2016-06-02 10:40:20 +02:00
mtd ubi: Don't bypass ->getattr() 2016-06-14 10:51:42 +02:00
net vmxnet3: segCnt can be 1 for LRO packets 2016-06-10 00:15:11 -07:00
nfc NFC: pn533: handle interrupted commands in pn533_recv_frame 2016-05-10 00:01:47 +02:00
ntb
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nubus
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nvdimm DAX error handling for 4.7 2016-05-26 19:34:26 -07:00
nvme NVMe: Only release requested regions 2016-06-09 14:28:28 -06:00
nvmem remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
of drivers/of: Fix depth for sub-tree blob in unflatten_dt_nodes() 2016-06-09 14:36:34 -05:00
oprofile
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parisc
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parport
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pci Char / Misc driver update for 4.7-rc1 2016-05-20 21:20:31 -07:00
pcmcia
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perf arm: pmu: Fix non-devicetree probing 2016-06-15 09:51:35 +01:00
phy phy: for 4.7-rc 2016-06-10 23:06:21 -07:00
pinctrl pinctrl: mediatek: fix dual-edge code defect 2016-05-31 10:13:45 +02:00
platform platform/x86: Drop duplicate dependencies on X86 2016-06-08 13:21:37 -07:00
pnp driver core update for 4.7-rc1 2016-05-20 21:26:15 -07:00
power power supply and reset changes for the v4.7 series 2016-05-20 14:06:21 -07:00
powercap Power management material for v4.7-rc1 2016-05-16 19:17:22 -07:00
pps
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ps3
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ptp ptp: oops in ptp_ioctl() 2016-05-29 22:32:27 -07:00
pwm pwm: atmel-hlcdc: Fix default PWM polarity 2016-06-14 10:51:45 +02:00
rapidio rapidio/mport_cdev: fix uapi type definitions 2016-05-05 17:38:53 -07:00
ras
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regulator Merge remote-tracking branches 'regulator/fix/qcom-smd' and 'regulator/fix/tps51632' into regulator-linus 2016-06-13 16:51:57 +01:00
remoteproc remoteproc: Add additional crash reasons 2016-05-12 15:50:19 -07:00
reset
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rpmsg rpmsg: add THIS_MODULE to rpmsg_driver in rpmsg core 2016-05-06 11:08:58 -07:00
rtc rtc: tps6586x: rename so module can be autoloaded 2016-05-21 17:07:17 +02:00
s390 DAX error handling for 4.7 2016-05-26 19:34:26 -07:00
sbus openprom: fix warning 2016-05-20 18:33:37 -07:00
scsi Merge remote-tracking branch 'mkp-scsi/4.7/scsi-fixes' into fixes 2016-06-04 09:53:29 -04:00
sfi
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sh
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sn
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soc soc: mtk-pmic-wrap: avoid integer overflow warning 2016-05-19 15:20:24 +02:00
spi sound updates #2 for 4.7-rc1 2016-05-28 12:23:12 -07:00
spmi
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ssb
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staging Revert "Staging: rtl8188eu: rtw_efuse: Use sizeof type *pointer instead of sizeof type." 2016-06-17 11:21:45 -07:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
tc
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thermal Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-06-12 06:30:39 -07:00
thunderbolt
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tty devpts: Make each mount of devpts an independent filesystem. 2016-06-05 10:36:01 -07:00
uio
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usb usbip: rate limit get_frame_number message 2016-06-17 18:00:46 -07:00
uwb
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vfio vfio/pci: Allow VPD short read 2016-05-31 21:25:52 -06:00
vhost target: make close_session optional 2016-05-10 01:19:26 -07:00
video OMAPDSS: HDMI5: Change DDC timings 2016-05-31 08:20:43 +03:00
virt
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virtio virtio_balloon: fix PFN format for virtio-1 2016-05-22 19:44:13 +03:00
vlynq
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vme
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w1
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watchdog watchdog: ebc-c384_wdt: Allow build for X86_64 2016-06-17 20:21:12 -07:00
xen Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
zorro
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Kconfig libnvdimm for 4.7 2016-05-23 11:18:01 -07:00
Makefile /dev/dax, pmem: direct access to persistent memory 2016-05-20 22:02:53 -07:00