linux-kernel - [webcam] WARNING: CPU: 0 PID: 1 at drivers/media/v4l2-core/videobuf2-core.c:2207 vb2_queue

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Date:	Sun, 23 Mar 2014 08:10:18 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Roland Scheidegger <rscheidegger_lists@...peed.ch>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [webcam] WARNING: CPU: 0 PID: 1 at
 drivers/media/v4l2-core/videobuf2-core.c:2207 vb2_queue_init()

FYI, the below WARNING has existed for 1 year and the first bad commit
is 240c3c3424366c8109babd2a0fe80855de511b35 ("Merge branch 'v4l_for_linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media").
    
[    2.104371] g_webcam gadget: uvc_function_bind
[    2.105567] ------------[ cut here ]------------
[    2.105567] ------------[ cut here ]------------
[    2.106779] WARNING: CPU: 0 PID: 1 at drivers/media/v4l2-core/videobuf2-core.c:2207 vb2_queue_init+0xa3/0x113()

git bisect start v3.10 v3.9 --
git bisect  bad ff89acc563a0bd49965674f56552ad6620415fe2  # 13:02      0-     15  Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
git bisect  bad 24d0c2542b38963ae4d5171ecc0a2c1326c656bc  # 14:41      0-      1  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect  bad 151173e8ce9b95bbbbd7eedb9035cfaffbdb7cb2  # 15:16      0-      4  Merge tag 'for-v3.10' of git://git.infradead.org/battery-2.6
git bisect good 6c24499f40d96bf07a85b709fb1bee5cea611a1d  # 15:51     20+     20  tracing: Fix small merge bug
git bisect good 5a5a1bf099d6942399ea0b34a62e5f0bc4c5c36e  # 16:13     20+     20  Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect  bad c9ef713993ba168b38d1a97ea0ab00874f1da022  # 16:46      0-      2  Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
git bisect  bad 240c3c3424366c8109babd2a0fe80855de511b35  # 17:06      0-     18  Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
git bisect good 5d434fcb255dec99189f1c58a06e4f56e12bf77d  # 17:18     20+     20  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
git bisect good 19b344efa35dbc253e2d10403dafe6aafda73c56  # 17:28     20+     20  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
git bisect good bae7432060960dd0ffdc4bd67986ac3d1f5733b0  # 19:25     20+     16  [media] go7007: add prio and control event support
git bisect good 82456708389d6d9eb81a4479d54efa0bf7dd8bf3  # 19:53     20+      1  [media] saa7134: v4l2-compliance: don't report invalid audio modes for radio
git bisect good b34f51fad396484e2bc102dcf95807b9990c3265  # 20:27     20+      1  [media] exynos4-is: Fix runtime PM handling on fimc-is probe error path
git bisect good 966a1601877c3d29065ab2dde838cdae16ccc099  # 20:53     20+      1  Merge branch 'topic/si476x' into patchwork
git bisect good 1f1988706d77083040113094a4bee2e9e1bdc34f  # 21:12     20+      3  [media] cx25821: setup output nodes correctly
git bisect good c82056d0b4ac7b805ac4e7d3870c42bb19e3b3d5  # 21:32     20+      0  [media] dib8000: store dtv_property_cache in a temp var
git bisect good a3f17af2d97a2a51af37e7b1dab5de5562c9b66d  # 22:36     20+      3  [media] cx25821-video: declare cx25821_vidioc_s_std as static
git bisect good 02615ed5e1b2283db2495af3cf8f4ee172c77d80  # 22:49     20+      1  [media] cx88: make core less verbose
git bisect good aad797c89903d570c17f6affc770eb98afd74e62  # 23:37     20+      0  Merge tag 'v3.9' into v4l_for_linus
git bisect good df90e2258950fd631cdbf322c1ee1f22068391aa  # 00:39     20+      0  Merge branch 'devel-for-v3.10' into v4l_for_linus
# first bad commit: [240c3c3424366c8109babd2a0fe80855de511b35] Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
git bisect good 19b344efa35dbc253e2d10403dafe6aafda73c56  # 00:41     60+     80  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
git bisect good df90e2258950fd631cdbf322c1ee1f22068391aa  # 00:44     60+      0  Merge branch 'devel-for-v3.10' into v4l_for_linus
git bisect  bad 0f2691c0856f6caa1825f2b307b0d786990c300b  # 00:44      0-     19  0day head guard for 'devel-hourly-2014032001'
git bisect  bad 887843961c4b4681ee993c36d4997bf4b4aa8253  # 01:19      0-     36  mm: fix bad rss-counter if remap_file_pages raced migration
git bisect  bad a654dc797f3ea1cb5719a71a17af35f57fddb2d8  # 01:30      0-      6  Add linux-next specific files for 20140320

Thanks,
Fengguang

View attachment "dmesg-yocto-cairo-47:20140320033513:x86_64-randconfig-wa1-03200201:3.14.0-rc7-wl-ath-04452-g0f2691c:3" of type "text/plain" (84236 bytes)

Download attachment "x86_64-randconfig-wa1-03200201-0f2691c0856f6caa1825f2b307b0d786990c300b-WARNING:---at----vb-_queue_init+-x-123735.log" of type "application/octet-stream" (69938 bytes)

View attachment "config-3.14.0-rc7-wl-ath-04452-g0f2691c" of type "text/plain" (77338 bytes)