Kernel warning slow path at boot since 4.3+
Submitted by Christian Casteyde
Assigned to Ian Romanick
Description
I was told to redirect this bug to i915 project (from https://bugzilla.kernel.org/show_bug.cgi?id=110191). Since Linux kernel 4.3, I get the following warning at boot on an HP dv6000 old hardware:
Other than this warning, everything seems to works fine after that.
pci 0000:00:1e.0: enabling device (0004 -> 0007)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x42f/0x5a0()
Modules linked in:
CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.3.3 #1 (closed)
Hardware name: Hewlett-Packard HP Pavilion dv6000 (GH906EA#ABF) /30BB, BIOS F.2E 03/22/2010
Workqueue: events_unbound async_run_entry_fn
00000000 00000000 f6483b90 c126173c 00000000 f6483bc0 c103ec3d c1822a38
00000001 00000006 c1884cd6 000001eb c1343c2f c1343c2f f65ab000 f5d8f898
f5d8f890 f6483bd0 c103eced 00000009 00000000 f6483c1c c1343c2f 00000558
Call Trace:
[<c126173c>] dump_stack+0x48/0x6c
[<c103ec3d>] warn_slowpath_common+0x7d/0xb0
[<c1343c2f>] ? drm_atomic_check_only+0x42f/0x5a0
[<c1343c2f>] ? drm_atomic_check_only+0x42f/0x5a0
[<c103eced>] warn_slowpath_null+0x1d/0x20
[<c1343c2f>] drm_atomic_check_only+0x42f/0x5a0
[<c1343033>] ? drm_atomic_set_crtc_for_plane+0x73/0x100
[<c1343db1>] drm_atomic_commit+0x11/0x50
[<c13a61f1>] intel_get_load_detect_pipe+0x3a1/0x5d0
[<c13db246>] intel_tv_detect+0xe6/0x5e0
[<c133e1a0>] ? drm_get_edid+0x20/0x3e0
[<c16e9f01>] ? hrtimer_nanosleep_restart+0x11/0x70
[<c131c1b3>] drm_helper_probe_single_connector_modes_merge_bits+0x2a3/0x450
[<c106134c>] ? update_curr+0x9c/0xe0
[<c131c372>] drm_helper_probe_single_connector_modes+0x12/0x20
[<c1325799>] drm_fb_helper_probe_connector_modes.isra.7+0x39/0x60
[<c132667b>] drm_fb_helper_initial_config+0x3b/0x360
[<c105963d>] ? finish_task_switch+0x5d/0x140
[<c13b62b4>] intel_fbdev_initial_config+0x14/0x20
[<c1057b31>] async_run_entry_fn+0x31/0xd0
[<c16e7977>] ? __schedule+0x1e7/0x7c0
[<c105100e>] process_one_work+0xee/0x2b0
[<c10512bd>] worker_thread+0xed/0x410
[<c10511d0>] ? process_one_work+0x2b0/0x2b0
[<c1055b66>] kthread+0x96/0xb0
[<c16eab41>] ret_from_kernel_thread+0x21/0x30
[<c1055ad0>] ? kthread_create_on_node+0x100/0x100
---[ end trace ab46bc531787df58 ]---
fbcon: inteldrmfb (fb0) is primary device
ata6: port disabled--ignoring
Version: 10.3