[Bug 90860] New: [SKL]igt/kms_plane causes WARNING: CPU: 2 PID: 5285 at drivers/gpu/drm/i915/i915_gem.c:5273 i915_gem_track_fb+0x61/0xf8 [i915]()

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Jun 4 23:06:54 PDT 2015 

https://bugs.freedesktop.org/show_bug.cgi?id=90860

            Bug ID: 90860
           Summary: [SKL]igt/kms_plane causes WARNING: CPU: 2 PID: 5285 at
                    drivers/gpu/drm/i915/i915_gem.c:5273
                    i915_gem_track_fb+0x61/0xf8 [i915]()
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116301
  --> https://bugs.freedesktop.org/attachment.cgi?id=116301&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, only happens on drm-intel-nightly kernel.

Non-working platforms: SKL

==kernel==
--------------------------
drm-intel-nightly/7d26f93488c5aa488867b3e3769bd4b4fb88d657
commit 7d26f93488c5aa488867b3e3769bd4b4fb88d657
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Wed Jun 3 14:28:08 2015 +0300

    drm-intel-nightly: 2015y-06m-03d-11h-27m-41s UTC integration manifest

==Bug detailed description==
-----------------------------
kms_plane causes [   46.123378] WARNING: CPU: 2 PID: 5285 at
drivers/gpu/drm/i915/i915_gem.c:5273 i915_gem_track_fb+0x61/0xf8 [i915](). I
test it on following 10 merged branch, it only happens on drm-intel-nightly
kernel.
Test kernel branch:
atomic-core  drm-intel-fixes        drm-intel-nightly  for-next
bxt-stage1   drm-intel-next-fixes   drm-misc
drm-fixes    drm-intel-next-queued  drm-next

IGT-Version: 1.10-gc4ec47b (x86_64) (Linux:
4.1.0-rc6_drm-intel-nightly_7d26f9_20150604+ x86_64)
Testing connector eDP-1 using pipe C plane 1
Subtest plane-panning-top-left-pipe-C-plane-1: SUCCESS (3.946s)

dmesg:
[   46.123378] WARNING: CPU: 2 PID: 5285 at
drivers/gpu/drm/i915/i915_gem.c:5273 i915_gem_track_fb+0x61/0xf8 [i915]()
[   46.123380] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))
[   46.123400] Modules linked in: dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic ppdev serio_raw pcspkr
snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep
 snd_pcm snd_timer snd soundcore i2c_i801 wmi battery parport_pc parport ac
acpi_cpufreq joydev i915 button video drm_kms_helper drm
[   46.123406] CPU: 2 PID: 5285 Comm: kms_plane Tainted: G     U  W      
4.1.0-rc6_drm-intel-nightly_7d26f9_20150604+ #788
[   46.123408] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.R00.B084.B00.1505120313 05/12/2015
[   46.123413]  0000000000000000 0000000000000009 ffffffff817a728c
ffff880083daf908
[   46.123417]  ffffffff8103ebde ffff8801637a0000 ffffffffa00a2bc3
0000000000000009
[   46.123420]  ffff8801637a0000 ffff8801637a0000 0000000000000001
ffff8801637f3860
[   46.123421] Call Trace:
[   46.123431]  [<ffffffff817a728c>] ? dump_stack+0x40/0x50
[   46.123436]  [<ffffffff8103ebde>] ? warn_slowpath_common+0x98/0xb0
[   46.123467]  [<ffffffffa00a2bc3>] ? i915_gem_track_fb+0x61/0xf8 [i915]
[   46.123471]  [<ffffffff8103ec3b>] ? warn_slowpath_fmt+0x45/0x4a
[   46.123499]  [<ffffffffa00a2bc3>] ? i915_gem_track_fb+0x61/0xf8 [i915]
[   46.123536]  [<ffffffffa00dcf2b>] ? intel_prepare_plane_fb+0x117/0x134
[i915]
[   46.123548]  [<ffffffffa0058834>] ?
drm_atomic_helper_prepare_planes+0x4b/0xa7 [drm_kms_helper]
[   46.123580]  [<ffffffffa00ebd93>] ? intel_atomic_commit+0x43/0x132 [i915]
[   46.123590]  [<ffffffffa0059d9b>] ?
drm_atomic_helper_plane_set_property+0x62/0xa3 [drm_kms_helper]
[   46.123605]  [<ffffffffa00185af>] ? drm_modeset_lock+0x4e/0xa3 [drm]
[   46.123626]  [<ffffffffa000b13f>] ? drm_mode_plane_set_obj_prop+0x22/0x48
[drm]
[   46.123634]  [<ffffffffa005b10d>] ? restore_fbdev_mode+0x5c/0xc3
[drm_kms_helper]
[   46.123641]  [<ffffffffa005c95e>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x1e/0x54 [drm_kms_helper]
[   46.123648]  [<ffffffffa005c9c2>] ? drm_fb_helper_set_par+0x2e/0x32
[drm_kms_helper]
[   46.123681]  [<ffffffffa00e8daf>] ? intel_fbdev_set_par+0x11/0x55 [i915]
[   46.123688]  [<ffffffff81345321>] ? number.isra.13+0x11f/0x215
[   46.123694]  [<ffffffff81386aa5>] ? fb_set_var+0x250/0x33b
[   46.123699]  [<ffffffff81345f8e>] ? vsnprintf+0x83/0x3b9
[   46.123705]  [<ffffffff8137f651>] ? fbcon_blank+0x75/0x228
[   46.123710]  [<ffffffff810df968>] ? file_ra_state_init+0xc/0x1d
[   46.123716]  [<ffffffff813d6541>] ? do_unblank_screen+0xef/0x168
[   46.123721]  [<ffffffff813cec31>] ? vt_ioctl+0x4de/0xf59
[   46.123727]  [<ffffffff813c6218>] ? tty_ioctl+0x954/0x9ba
[   46.123732]  [<ffffffff81121a03>] ? do_filp_open+0x2b/0x6f
[   46.123736]  [<ffffffff81123706>] ? do_vfs_ioctl+0x360/0x424
[   46.123740]  [<ffffffff8112b024>] ? __fd_install+0x15/0x40
[   46.123744]  [<ffffffff81123813>] ? SyS_ioctl+0x49/0x7a
[   46.123749]  [<ffffffff817acdd7>] ? system_call_fastpath+0x12/0x6a
[   46.123787] ---[ end trace 48704d6ead8b9532 ]---

==Reproduce steps==
---------------------------- 
1. ./kms_plane --run-subtest plane-panning-top-left-pipe-C-plane-1

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