[  240.130488] INFO: task gst-plugin-scan:1487 blocked for more than 120 seconds.
[  240.130491]       Not tainted 4.2.0-rc5+ #69
[  240.130492] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  240.130493] gst-plugin-scan D ffff880409eb7668     0  1487      1 0x00000000
[  240.130496]  ffff880409eb7668 0000000000000000 ffff880408f25e00 ffffffff815c63c3
[  240.130498]  ffff880409eb76d0 ffff8804061352c0 000000001ee4ed1d ffff880409eb7658
[  240.130499]  ffff880409eb8000 0000000000000000 ffff880409eb76d0 ffff8804061352c0
[  240.130501] Call Trace:
[  240.130507]  [<ffffffff815c63c3>] ? _raw_spin_unlock_irq+0x28/0x34
[  240.130508]  [<ffffffff815c1d92>] schedule+0x79/0x8f
[  240.130511]  [<ffffffff813b9c98>] rpm_resume+0x1b6/0x412
[  240.130514]  [<ffffffff810d8828>] ? abort_exclusive_wait+0x94/0x94
[  240.130516]  [<ffffffff813b9de3>] rpm_resume+0x301/0x412
[  240.130517]  [<ffffffff813b9f5a>] __pm_runtime_resume+0x66/0x82
[  240.130520]  [<ffffffff81412f4d>] usb_autopm_get_interface+0x1e/0x48
[  240.130525]  [<ffffffffa0253e01>] snd_usb_autoresume+0x28/0x32 [snd_usb_audio]
[  240.130528]  [<ffffffffa0253e36>] snd_usb_lock_shutdown+0x2b/0x63 [snd_usb_audio]
[  240.130531]  [<ffffffffa02573eb>] snd_usb_mixer_set_ctl_value+0xbf/0x165 [snd_usb_audio]
[  240.130534]  [<ffffffffa0257604>] snd_usb_set_cur_mix_value+0x4d/0x77 [snd_usb_audio]
[  240.130537]  [<ffffffffa0257e3f>] restore_mixer_value+0x74/0x87 [snd_usb_audio]
[  240.130539]  [<ffffffffa0259631>] snd_usb_mixer_resume+0x64/0x70 [snd_usb_audio]
[  240.130542]  [<ffffffffa0253061>] __usb_audio_resume+0x61/0xc8 [snd_usb_audio]
[  240.130543]  [<ffffffff81413de1>] ? usb_runtime_suspend+0x63/0x63
[  240.130546]  [<ffffffffa02530d6>] usb_audio_reset_resume+0xe/0x10 [snd_usb_audio]
[  240.130547]  [<ffffffff8141311b>] usb_resume_interface.isra.1+0x6c/0xbd
[  240.130549]  [<ffffffff8141320c>] usb_resume_both+0xa0/0xc0
[  240.130550]  [<ffffffff81413df6>] usb_runtime_resume+0x15/0x17
[  240.130551]  [<ffffffff813b9027>] __rpm_callback+0x35/0x5d
[  240.130553]  [<ffffffff81413de1>] ? usb_runtime_suspend+0x63/0x63
[  240.130554]  [<ffffffff813b90a7>] rpm_callback+0x58/0x77
[  240.130555]  [<ffffffff81413de1>] ? usb_runtime_suspend+0x63/0x63
[  240.130557]  [<ffffffff813b9e52>] rpm_resume+0x370/0x412
[  240.130558]  [<ffffffff813b9de3>] rpm_resume+0x301/0x412
[  240.130560]  [<ffffffff813b9f5a>] __pm_runtime_resume+0x66/0x82
[  240.130561]  [<ffffffff815c38f3>] ? __mutex_unlock_slowpath+0x110/0x11b
[  240.130563]  [<ffffffff81412f4d>] usb_autopm_get_interface+0x1e/0x48
[  240.130565]  [<ffffffffa039f1f7>] uvc_v4l2_open+0x3f/0x12b [uvcvideo]
[  240.130568]  [<ffffffffa036953d>] v4l2_open+0x88/0xcb [videodev]
[  240.130571]  [<ffffffff81178766>] chrdev_open+0x13b/0x175
[  240.130572]  [<ffffffff8117862b>] ? cdev_put+0x20/0x20
[  240.130573]  [<ffffffff81172dd2>] do_dentry_open.isra.1+0x1d2/0x2c9
[  240.130575]  [<ffffffff8117cf85>] ? __inode_permission+0x84/0x95
[  240.130576]  [<ffffffff81173a97>] vfs_open+0x50/0x54
[  240.130577]  [<ffffffff81181485>] path_openat+0xa90/0xd0f
[  240.130579]  [<ffffffff810e0800>] ? __lock_acquire+0x673/0xabf
[  240.130580]  [<ffffffff81182543>] do_filp_open+0x48/0xac
[  240.130581]  [<ffffffff815c6313>] ? _raw_spin_unlock+0x23/0x2e
[  240.130584]  [<ffffffff8118f45c>] ? __alloc_fd+0x144/0x156
[  240.130585]  [<ffffffff81173ddb>] do_sys_open+0x154/0x1f7
[  240.130586]  [<ffffffff81173e97>] SyS_open+0x19/0x1b
[  240.130587]  [<ffffffff815c6b57>] entry_SYSCALL_64_fastpath+0x12/0x6f
[  240.130589] no locks held by gst-plugin-scan/1487.