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Date:	Mon, 28 Jul 2014 10:02:41 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Rob Clark <robdclark@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [LKP] [drm] WARNING: CPU: 2 PID: 430 at drivers/gpu/drm/drm_crtc.c:1391
 drm_universal_plane_init+0x241/0x260 [drm]()

FYI, we noticed the below changes on

git://people.freedesktop.org/~robclark/linux cold-fusion-v3.16-rc5
commit 08172e9d2385ca9bd545a8229ac749f589146a31 ("drm: convert plane to properties/state")

+-----------------+------------+------------+
|                 | 88471ddbb1 | 08172e9d23 |
+-----------------+------------+------------+
| boot_successes  | 10         | 10         |
| early-boot-hang | 1          | 1          |
+-----------------+------------+------------+


[   21.274681] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   21.275090] [drm] Driver supports precise vblank timestamp query.
[   21.275984] ------------[ cut here ]------------
[   21.276300] WARNING: CPU: 2 PID: 430 at drivers/gpu/drm/drm_crtc.c:1391 drm_universal_plane_init+0x241/0x260 [drm]()
[   21.277126] Modules linked in: firewire_ohci(+) firewire_core crc_itu_t snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic shpchp pcspkr i2c_i801 ahci snd_hda_intel i915(+) libahci snd_hda_controller libata snd_hda_codec snd_hwdep snd_pcm snd_timer drm_kms_helper snd soundcore drm winbond_cir rc_core floppy(+) parport_pc parport video
[   21.279682] CPU: 2 PID: 430 Comm: modprobe Not tainted 3.16.0-rc6-wl-ath-04110-gc6264ea #1
[   21.280208] Hardware name: Intel Corporation 2012 Client Platform/LosLunas CRB, BIOS ACRVMBY1.86C.0054.B00.1107311147 07/31/2011
[   21.281029]  0000000000000009 ffff88041b34b860 ffffffff8182d64b 0000000000000000
[   21.281655]  ffff88041b34b898 ffffffff8106d16d ffff88007fb32000 0000000000000000
[   21.282191]  ffff88041a9ebe00 000000000000000a ffff88041a9ebe00 ffff88041b34b8a8
[   21.282791] Call Trace:
[   21.282958]  [<ffffffff8182d64b>] dump_stack+0x4d/0x66
[   21.283290]  [<ffffffff8106d16d>] warn_slowpath_common+0x7d/0xa0
[   21.283756]  [<ffffffff8106d24a>] warn_slowpath_null+0x1a/0x20
[   21.284134]  [<ffffffffa007d121>] drm_universal_plane_init+0x241/0x260 [drm]
[   21.284697]  [<ffffffffa01dffb1>] intel_modeset_init+0x471/0xe70 [i915]
[   21.285127]  [<ffffffffa01ae67a>] ? ibx_irq_postinstall+0x5a/0xe0 [i915]
[   21.285652]  [<ffffffffa01ae7c6>] ? ironlake_irq_postinstall+0xc6/0x1a0 [i915]
[   21.286137]  [<ffffffffa020d00a>] i915_driver_load+0xb4a/0x1000 [i915]
[   21.286640]  [<ffffffff813dffb8>] ? kobject_uevent_env+0x178/0x690
[   21.287028]  [<ffffffff814e1247>] ? get_device+0x17/0x30
[   21.287361]  [<ffffffff814e68d5>] ? klist_class_dev_get+0x15/0x20
[   21.287813]  [<ffffffff8181b98a>] ? klist_add_tail+0x3a/0x40
[   21.288166]  [<ffffffff814e2979>] ? device_add+0x1f9/0x610
[   21.288608]  [<ffffffffa0078166>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
[   21.289033]  [<ffffffffa007478d>] drm_dev_register+0xad/0x100 [drm]
[   21.289420]  [<ffffffffa007725f>] drm_get_pci_dev+0x8f/0x1f0 [drm]
[   21.289887]  [<ffffffffa017d59b>] i915_pci_probe+0x3b/0x60 [i915]
[   21.290258]  [<ffffffff814148a5>] local_pci_probe+0x45/0xa0
[   21.290690]  [<ffffffff81415a35>] ? pci_match_device+0xe5/0x110
[   21.291078]  [<ffffffff81415b71>] pci_device_probe+0xd1/0x130
[   21.291435]  [<ffffffff814e5a10>] driver_probe_device+0x90/0x3c0
[   21.291891]  [<ffffffff814e5e13>] __driver_attach+0x93/0xa0
[   21.292227]  [<ffffffff814e5d80>] ? __device_attach+0x40/0x40
[   21.292640]  [<ffffffff814e3a93>] bus_for_each_dev+0x63/0xa0
[   21.292969]  [<ffffffff814e54ae>] driver_attach+0x1e/0x20
[   21.293293]  [<ffffffff814e50c0>] bus_add_driver+0x180/0x250
[   21.293705]  [<ffffffff814e65e4>] driver_register+0x64/0xf0
[   21.294041]  [<ffffffff8141423c>] __pci_register_driver+0x4c/0x50
[   21.294399]  [<ffffffffa00774ca>] drm_pci_init+0x10a/0x140 [drm]
[   21.294863]  [<ffffffffa026d000>] ? 0xffffffffa026cfff
[   21.295209]  [<ffffffffa026d089>] i915_init+0x89/0x90 [i915]
[   21.295654]  [<ffffffff8100212c>] do_one_initcall+0xbc/0x1f0
[   21.296010]  [<ffffffff81190802>] ? __vunmap+0xb2/0x100
[   21.296330]  [<ffffffff810ecbdc>] load_module+0x15fc/0x1a30
[   21.296760]  [<ffffffff810e8770>] ? store_uevent+0x40/0x40
[   21.297132]  [<ffffffff810ed0d1>] SyS_init_module+0xc1/0x110
[   21.297470]  [<ffffffff81836469>] system_call_fastpath+0x16/0x1b
[   21.297910] ---[ end trace ecc622d672d3c733 ]---
[   21.298652] ------------[ cut here ]------------



Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Thanks,
Aaron

View attachment "reproduce" of type "text/plain" (585 bytes)

View attachment "dmesg" of type "text/plain" (186843 bytes)

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