[Bug 91866] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91866

--- Comment #3 from rauchwolke at gmx.net ---
i get the same here, seems the error is sometimes triggered when i play a video
with mpv

[133382.204471] WARNING: CPU: 1 PID: 3469 at
drivers/gpu/drm/i915/i915_gem.c:5269 i915_gem_track_fb+0xf8/0x130()
[133382.204473] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))
[133382.204478] CPU: 1 PID: 3469 Comm: X Tainted: G        W       4.2.2 #2
[133382.204484]  0000000000000000 ffffffff81f83550 ffffffff81b5f524
ffff880406f0bbc8
[133382.204488]  ffffffff81106cb2 ffff88040b1c5200 ffff88040b1c5200
0000000000000010
[133382.204492]  ffff88040b1c5200 0000000000000010 ffffffff81106d65
ffffffff81f837f0
[133382.204495] Call Trace:
[133382.204501]  [<ffffffff81b5f524>] ? dump_stack+0x40/0x50
[133382.204507]  [<ffffffff81106cb2>] ? warn_slowpath_common+0x72/0xb0
[133382.204511]  [<ffffffff81106d65>] ? warn_slowpath_fmt+0x45/0x50
[133382.204515]  [<ffffffff815d54b8>] ? i915_gem_track_fb+0xf8/0x130
[133382.204521]  [<ffffffff816128da>] ? intel_prepare_plane_fb+0xda/0x190
[133382.204526]  [<ffffffff815851fd>] ?
drm_atomic_helper_prepare_planes+0x4d/0xd0
[133382.204531]  [<ffffffff81623b56>] ? intel_atomic_commit+0x36/0xf0
[133382.204534]  [<ffffffff8158611e>] ?
drm_atomic_helper_plane_set_property+0x7e/0xc0
[133382.204541]  [<ffffffff8159ab2f>] ? drm_mode_plane_set_obj_prop+0x1f/0x70
[133382.204546]  [<ffffffff8159ae0c>] ?
drm_mode_obj_set_property_ioctl+0x1fc/0x240
[133382.204550]  [<ffffffff8158e3da>] ? drm_ioctl+0x2fa/0x560
[133382.204555]  [<ffffffff8159ac10>] ?
drm_mode_obj_get_properties_ioctl+0x90/0x90
[133382.204561]  [<ffffffff8121b9c1>] ? fsnotify+0x2c1/0x3c0
[133382.204566]  [<ffffffff811f798c>] ? do_vfs_ioctl+0x2bc/0x4a0
[133382.204570]  [<ffffffff811e7442>] ? vfs_write+0x152/0x190
[133382.204576]  [<ffffffff8141e87d>] ? security_file_ioctl+0x3d/0x60
[133382.204580]  [<ffffffff811f7bdf>] ? SyS_ioctl+0x6f/0x80
[133382.204584]  [<ffffffff81b69bd7>] ? entry_SYSCALL_64_fastpath+0x12/0x6a
[133382.204587] ---[ end trace e872fcca86ba70b8 ]---

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