warnings from drm_fb_helper_lastclose in Mesa CI
kernel 5.13.0-rc5linux-v5.13-rc5-for-mesa-ci-2bb5d9ffd79c from https://gitlab.freedesktop.org/gfx-ci/linux
excerpt:
2021-10-12T18:27:32.202338 [0m[ 377.720641] ------------[ cut here ]------------
2021-10-12T18:27:32.213880 [ 377.725266] WARNING: CPU: 1 PID: 1175 at drivers/gpu/drm/drm_atomic.c:1572 __drm_atomic_helper_set_config+0x228/0x320
2021-10-12T18:27:32.219645 [ 377.735870] Modules linked in: amdgpu drm_ttm_helper ttm gpu_sched
2021-10-12T18:27:32.233855 [ 377.742056] CPU: 1 PID: 1175 Comm: test_va_api Tainted: G W 5.13.0-rc5linux-v5.13-rc5-for-mesa-ci-2bb5d9ffd79c.tar.bz2 #1
2021-10-12T18:27:32.238625 [ 377.754300] Hardware name: Google Grunt/Grunt, BIOS 09/05/2019
2021-10-12T18:27:32.242822 [ 377.760214] RIP: 0010:__drm_atomic_helper_set_config+0x228/0x320
2021-10-12T18:27:32.259661 [ 377.766218] Code: 85 c0 0f 85 8b fe ff ff 31 f6 4c 89 ef e8 20 5b 01 00 e9 19 ff ff ff c1 e2 10 c1 e0 10 41 89 55 3c 41 89 45 38 e9 06 ff ff ff <0f> 0b e9 48 fe ff ff 0f 0b e9 4c fe ff ff 45 31 ed 31 c0 48 83 7b
2021-10-12T18:27:32.265906 [ 377.784965] RSP: 0018:ffffb3d5007c7d50 EFLAGS: 00010246
2021-10-12T18:27:32.272554 [ 377.790190] RAX: 0000000000000000 RBX: ffff9e3281509480 RCX: ffff9e32812f7348
2021-10-12T18:27:32.279476 [ 377.797316] RDX: 000000000000002d RSI: ffff9e3284ebe080 RDI: ffff9e3284ebe580
2021-10-12T18:27:32.285649 [ 377.804443] RBP: ffff9e3284ebe580 R08: ffff9e3284dafa00 R09: ffff9e3284ebe580
2021-10-12T18:27:32.292268 [ 377.811569] R10: ffff9e328127d6c0 R11: 0000000000000008 R12: 000000008136e000
2021-10-12T18:27:32.299221 [ 377.818696] R13: ffff9e328136e000 R14: ffff9e3284dafa00 R15: ffff9e328135d000
2021-10-12T18:27:32.308902 [ 377.825823] FS: 00007f6856c5a2c0(0000) GS:ffff9e32aad00000(0000) knlGS:0000000000000000
2021-10-12T18:27:32.315490 [ 377.833902] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2021-10-12T18:27:32.322142 [ 377.839641] CR2: 00007f685690f100 CR3: 00000001046a8000 CR4: 00000000001506e0
2021-10-12T18:27:32.325528 [ 377.846768] Call Trace:
2021-10-12T18:27:32.328565 [ 377.849230] drm_client_modeset_commit_atomic+0x16a/0x220
2021-10-12T18:27:32.335696 [ 377.854640] drm_client_modeset_commit_locked+0x51/0x150
2021-10-12T18:27:32.338343 [ 377.859952] drm_client_modeset_commit+0x1f/0x40
2021-10-12T18:27:32.345129 [ 377.864568] drm_fb_helper_lastclose+0x3e/0x80
2021-10-12T18:27:32.348244 [ 377.869013] drm_release+0xd4/0x110
2021-10-12T18:27:32.351596 [ 377.872502] __fput+0x87/0x230
2021-10-12T18:27:32.354654 [ 377.875558] task_work_run+0x57/0x90
2021-10-12T18:27:32.357804 [ 377.879136] exit_to_user_mode_prepare+0x13c/0x140
2021-10-12T18:27:32.367193 [ 377.883925] syscall_exit_to_user_mode+0x1d/0x40
2021-10-12T18:27:32.372720 [ 377.888541] ? __x64_sys_close+0x9/0x40
2021-10-12T18:27:32.373019 [ 377.892377] do_syscall_64+0x4d/0x80
2021-10-12T18:27:32.378018 [ 377.895954] entry_SYSCALL_64_after_hwframe+0x44/0xae
2021-10-12T18:27:32.378268 [ 377.901006] RIP: 0033:0x7f6856a1e0f3
2021-10-12T18:27:32.397687 [ 377.904580] Code: 8b 15 d9 9e 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
2021-10-12T18:27:32.404040 [ 377.923330] RSP: 002b:00007fff4ef33b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
2021-10-12T18:27:32.414691 [ 377.930897] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6856a1e0f3
2021-10-12T18:27:32.420864 [ 377.938023] RDX: 000055e6c795ff90 RSI: 0000000000000000 RDI: 0000000000000003
2021-10-12T18:27:32.427386 [ 377.945149] RBP: 00007fff4ef33c40 R08: 00007fff4ef33c28 R09: 00007f6856a01be0
2021-10-12T18:27:32.433802 [ 377.952279] R10: 000055e6c7863906 R11: 0000000000000246 R12: 000055e6c78ed464
2021-10-12T18:27:32.441053 [ 377.959408] R13: 0000000000000000 R14: 0000000000000011 R15: 0000000000000000
2021-10-12T18:27:32.447444 [ 377.966543] ---[ end trace 31088a5535eed18b ]---Example job: https://gitlab.freedesktop.org/anholt/mesa/-/jobs/14638956#L4662