[Intel-gfx] 4.2.0+ warning in dmesg drm_atomic.c:491 drm_atomic_check_only+0x19e/0x401()

[Hans de Bruin]

Hi

Since this morning this warning is in my kernel log:

[   10.588770] ------------[ cut here ]------------
[   10.593120] WARNING: CPU: 0 PID: 1477 at 
/usr/src/linux.git/drivers/gpu/drm/drm_atomic.c:491 
drm_atomic_check_only+0x19e/0x401()
[   10.597589] Modules linked in:
[   10.601962] CPU: 0 PID: 1477 Comm: kworker/0:5 Tainted: G        W 
     4.2.0+ #822
[   10.606363] Hardware name: Dell Inc. Latitude D430 
/0XW455, BIOS A02 10/11/2007
[   10.610827] Workqueue: events output_poll_execute
[   10.615241]  000002ba 00000000 f5941c70 c14eeecb f5941c88 c105b158 
c12740a2 f5ab0000
[   10.619761]  f62c0000 c17092f8 f5941c98 c105b1d3 00000009 00000000 
f5941cb8 c12740a2
[   10.624296]  00000001 f6222000 00000002 f5ab0000 f6222000 f6222000 
f5941cc8 c1274313
[   10.628817] Call Trace:
[   10.633175]  [<c14eeecb>] dump_stack+0x16/0x18
[   10.637525]  [<c105b158>] warn_slowpath_common+0x72/0x89
[   10.641866]  [<c12740a2>] ? drm_atomic_check_only+0x19e/0x401
[   10.646134]  [<c105b1d3>] warn_slowpath_null+0xf/0x13
[   10.650324]  [<c12740a2>] drm_atomic_check_only+0x19e/0x401
[   10.654473]  [<c1274313>] drm_atomic_commit+0xe/0x44
[   10.658668]  [<c12c81cf>] intel_get_load_detect_pipe+0x40e/0x48b
[   10.662791]  [<c12f0d1a>] intel_tv_detect+0x10b/0x43a
[   10.666900]  [<c12558f3>] 
drm_helper_probe_single_connector_modes_merge_bits+0xaf/0x34a
[   10.671061]  [<c1255b98>] drm_helper_probe_single_connector_modes+0xa/0xc
[   10.675163]  [<c125bf73>] drm_fb_helper_probe_connector_modes+0x3b/0x49
[   10.679269]  [<c125d744>] drm_fb_helper_hotplug_event+0x61/0x94
[   10.683298]  [<c12d49df>] intel_fbdev_output_poll_changed+0x15/0x17
[   10.687373]  [<c125562c>] drm_kms_helper_hotplug_event+0x1c/0x1f
[   10.691502]  [<c1255759>] output_poll_execute+0x108/0x145
[   10.695629]  [<c106801a>] process_one_work+0x152/0x248
[   10.699777]  [<c1068796>] worker_thread+0x236/0x327
[   10.703872]  [<c1068560>] ? cancel_delayed_work_sync+0xf/0xf
[   10.707982]  [<c106b8b6>] kthread+0xa3/0xa8
[   10.712016]  [<c14f3380>] ret_from_kernel_thread+0x20/0x30
[   10.716035]  [<c106b813>] ? kthread_worker_fn+0x100/0x100
[   10.720696] ---[ end trace b2652b27bfce9d22 ]---

-- 
Hans

In case I need to bisect: good..bad : 51e771c..6c0f568