linux-kernel - WARNING: at drivers/media/v4l2-core/videobuf2-core.c:2065 vb2_queue

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Message-ID: <20130529111035.GA18917@localhost>
Date:	Wed, 29 May 2013 19:10:35 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Kamil Debski <k.debski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: WARNING: at drivers/media/v4l2-core/videobuf2-core.c:2065
 vb2_queue_init()

Greetings,

I got the below dmesg and the first bad commit is

commit 6aa69f99b2ecc7f9b387fcf22d30e6601b58819f
Author: Kamil Debski <k.debski@...sung.com>
Date:   Fri Jan 25 06:29:57 2013 -0300

    [media] vb2: Add support for non monotonic timestamps
    
    Not all drivers use monotonic timestamps. This patch adds a way to set the
    timestamp type per every queue.
    In addition, set proper timestamp type in drivers that I am sure that use
    either MONOTONIC or COPY timestamps. Other drivers will correctly report
    UNKNOWN timestamp type instead of assuming that all drivers use monotonic
    timestamps.
    
    Signed-off-by: Kamil Debski <k.debski@...sung.com>
    Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
    Reviewed-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
    Acked-by: Hans Verkuil <hans.verkuil@...co.com>
    Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
    Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>

[   21.139201] Colour QuickCam for Video4Linux v0.06
[   21.662974] ------------[ cut here ]------------
[   21.664255] WARNING: at /c/kernel-tests/src/linux/drivers/media/v4l2-core/videobuf2-core.c:2065 vb2_queue_init+0xe5/0x1c0()
[   21.667066] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-rc3-00088-g459e3a1 #11
[   21.668980] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007

git bisect start 459e3a152aa809827367f5486e179cbabebb6877 v3.9 --
git bisect  bad 73287a43cc79ca06629a88d1a199cd283f42456a  #     0  2013-05-29 16:45:09  Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect good 5d434fcb255dec99189f1c58a06e4f56e12bf77d  #    10  2013-05-29 16:49:30  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
git bisect good 91bc033c4d01656e3d8e45a13fd58924a3099693  #    10  2013-05-29 16:53:47  bridge: avoid OOPS if root port not found
git bisect  bad 165bc513f7ec54d3fa3660f5c851c4bbc533d577  #     0  2013-05-29 16:57:05  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
git bisect  bad b12f7dd51abf419b9279f3ff2fdc3c06fe50c10f  #     0  2013-05-29 16:59:52  [media] tw9906: Remove unneeded version.h header include
git bisect  bad 05f0ffbc487517a529c00119d0bfde33df509b52  #     0  2013-05-29 17:02:32  [media] siano: use USB endpoint descriptors for in/out endp
git bisect good 2aeb73e19dc3d17beebc1b9a678f4c60e1072e25  #    10  2013-05-29 17:14:08  [media] stk-webcam: add ASUS F3JC to upside-down list
git bisect  bad f1065c964869aecd5af04291476c358fd5ab9a8f  #     0  2013-05-29 17:19:27  [media] media: tuners: Remove redundant NULL check before kfree
git bisect  bad 39696009d0d4472606b7fb90fc635a0d0fecba60  #     0  2013-05-29 17:23:10  [media] s2255: add device_caps support to querycap
git bisect  bad 69b95a3a80b44ebb71bf153e79bcb8580e1d3de5  #     0  2013-05-29 17:26:27  [media] s3c-camif: Fail on insufficient number of allocated buffers
git bisect good 8407653f5e2b9805958e0a392c0411ce027a3934  #    10  2013-05-29 17:44:16  [media] stk-webcam: zero the priv field of v4l2_pix_format
git bisect good f81e372a5d11694b86fc35ded379a441c209b920  #    10  2013-05-29 18:02:13  [media] stk-webcam: s_fmt shouldn't grab ownership
git bisect good 53bf0f446bc387eabdd535dca080789cc74607f4  #    10  2013-05-29 18:19:30  [media] v4l: Define video buffer flag for the COPY timestamp type
git bisect  bad 6aa69f99b2ecc7f9b387fcf22d30e6601b58819f  #     0  2013-05-29 18:27:33  [media] vb2: Add support for non monotonic timestamps
git bisect good 53bf0f446bc387eabdd535dca080789cc74607f4  #    30  2013-05-29 18:39:26  [media] v4l: Define video buffer flag for the COPY timestamp type
git bisect  bad 459e3a152aa809827367f5486e179cbabebb6877  #     0  2013-05-29 18:40:46  Merge remote-tracking branch 'tip/x86/urgent' into devel-snb-i386-2013-05-29-07-09
git bisect  bad 1ca94a12e6c269b0dfc10424c27ff295b3420e9c  #     0  2013-05-29 18:53:54  Add linux-next specific files for 20130529

Thanks,
Fengguang

View attachment "dmesg-kvm-athens-31396-2013-05-29-07-27-53-3.10.0-rc3-00088-g459e3a1-11" of type "text/plain" (142626 bytes)

View attachment "459e3a152aa809827367f5486e179cbabebb6877-bisect.log" of type "text/plain" (9478 bytes)

View attachment ".config-bisect" of type "text/plain" (66611 bytes)