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4fc788f5ee
What I never hit in testing, but Mika immediately did, was a GPU hang
with a pending fence release (where a tiled object has been changed by
the user to be untiled, and the update has not yet been committed to the
fence register). As the stride/tiling is 0, this causes a divide-by-zero
error when trying to write the new fence parameters:
[ 28.784518] drm/i915: Resetting chip after gpu hang
[ 28.784551] divide error: 0000 [#1] PREEMPT SMP
[ 28.784565] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat mxm_wmi x86_pkg_temp_thermal snd_hda_codec_hdmi kvm irqbypass snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec serio_raw snd_hwdep snd_hda_core snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_timer snd_seq_device snd soundcore mac_hid wmi efivarfs autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx raid0 multipath linear psmouse e1000e ptp pps_core nvme nvme_core i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm video
[ 28.784738] CPU: 0 PID: 1692 Comm: kworker/0:2 Not tainted 4.8.0-rc2+ #895
[ 28.784752] Hardware name: System manufacturer System Product Name/Z170M-PLUS, BIOS 1803 05/09/2016
[ 28.784786] Workqueue: events_long i915_hangcheck_elapsed [i915]
[ 28.784814] task: ffff923c18f59d40 task.stack: ffff923c1b7e4000
[ 28.784827] RIP: 0010:[<ffffffffc0475b5f>] [<ffffffffc0475b5f>] fence_write+0x9f/0x3b0 [i915]
[ 28.784854] RSP: 0018:ffff923c1b7e7b30 EFLAGS: 00010246
[ 28.784866] RAX: 00000000008ca000 RBX: ffff923c18540000 RCX: 0000000000000020
[ 28.784880] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000596d000
[ 28.784894] RBP: ffff923c1b7e7b68 R08: 0000000000000000 R09: 0000000000000000
[ 28.784908] R10: 0000000000000000 R11: 00000000008ca000 R12: ffff923c1ef9d600
[ 28.784921] R13: 0000000000100040 R14: 0000000000100044 R15: ffff923c18549908
[ 28.784935] FS: 0000000000000000(0000) GS:ffff923c36c00000(0000) knlGS:0000000000000000
[ 28.784951] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 28.784962] CR2: 00007f193373c893 CR3: 0000000419c78000 CR4: 00000000003406f0
[ 28.784976] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 28.784990] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 28.785004] Stack:
[ 28.785009] 000000000596c03b ffff923c1b7e7b68 ffff923c18549938 0000000000000009
[ 28.785026] ffff923c18540000 ffff923c18549280 ffff923c18547ce8 ffff923c1b7e7b90
[ 28.785044] ffffffffc04761f9 ffff923c18540000 ffff923c18547d00 ffff923c18548ff8
[ 28.785062] Call Trace:
[ 28.785078] [<ffffffffc04761f9>] i915_gem_restore_fences+0x39/0x50 [i915]
[ 28.785102] [<ffffffffc047fe89>] i915_gem_reset+0x179/0x300 [i915]
Reported-by: Mika Kuoppala <mika.kuoppala@intel.com>
Fixes:
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| .. | ||
| accessibility | ||
| acpi | ||
| amba | ||
| android | ||
| ata | ||
| atm | ||
| auxdisplay | ||
| base | ||
| bcma | ||
| block | ||
| bluetooth | ||
| bus | ||
| cdrom | ||
| char | ||
| clk | ||
| clocksource | ||
| connector | ||
| cpufreq | ||
| cpuidle | ||
| crypto | ||
| dax | ||
| dca | ||
| devfreq | ||
| dio | ||
| dma | ||
| dma-buf | ||
| edac | ||
| eisa | ||
| extcon | ||
| firewire | ||
| firmware | ||
| fmc | ||
| fpga | ||
| gpio | ||
| gpu | ||
| hid | ||
| hsi | ||
| hv | ||
| hwmon | ||
| hwspinlock | ||
| hwtracing | ||
| i2c | ||
| ide | ||
| idle | ||
| iio | ||
| infiniband | ||
| input | ||
| iommu | ||
| ipack | ||
| irqchip | ||
| isdn | ||
| leds | ||
| lguest | ||
| lightnvm | ||
| macintosh | ||
| mailbox | ||
| mcb | ||
| md | ||
| media | ||
| memory | ||
| memstick | ||
| message | ||
| mfd | ||
| misc | ||
| mmc | ||
| mtd | ||
| net | ||
| nfc | ||
| ntb | ||
| nubus | ||
| nvdimm | ||
| nvme | ||
| nvmem | ||
| of | ||
| oprofile | ||
| parisc | ||
| parport | ||
| pci | ||
| pcmcia | ||
| perf | ||
| phy | ||
| pinctrl | ||
| platform | ||
| pnp | ||
| power | ||
| powercap | ||
| pps | ||
| ps3 | ||
| ptp | ||
| pwm | ||
| rapidio | ||
| ras | ||
| regulator | ||
| remoteproc | ||
| reset | ||
| rpmsg | ||
| rtc | ||
| s390 | ||
| sbus | ||
| scsi | ||
| sfi | ||
| sh | ||
| sn | ||
| soc | ||
| spi | ||
| spmi | ||
| ssb | ||
| staging | ||
| target | ||
| tc | ||
| thermal | ||
| thunderbolt | ||
| tty | ||
| uio | ||
| usb | ||
| uwb | ||
| vfio | ||
| vhost | ||
| video | ||
| virt | ||
| virtio | ||
| vlynq | ||
| vme | ||
| w1 | ||
| watchdog | ||
| xen | ||
| zorro | ||
| Kconfig | ||
| Makefile | ||