Hi Laurent,
this was probably one hack comment to much,
so it did not get much attention. :)
It is possible that this patch is not fully a workaround. But I am not
aware how much this could break along the way.
Thanks,
Michael
On Thu, Oct 02, 2014 at 06:09:47PM +0200, Michael Grzeschik wrote:
> Currently the uvc_driver is not cleaning up its child devices if a
> device is still in use. It leads to orphaned devices which are not
> sitting on any interface. They get cleaned up on uvc_delete which will
> be called on uvc_remove after the userspace application is closing the
> stream. When PM_RUNTIME is used in the kernel, this leads to the
> following backtrace for missing sysfs entries in the orphaned kobjects.
>
> This patch is moving the device cleanup code for the child devices from
> uvc_delete to uvc_unregister_video. It is an *HACK* workaround which
> is ment to initiate the discussion for a proper solution.
>
> This behaviour can simply be reproduced by the following command:
>
> $ gst-launch v4l2src device=/dev/video0 ! fakesink
>
> -> Now disconnect the UVC Camera while the stream is still open and used
>
> $ <Ctrl-C> # to close the running gstreamer pipeline
>
> [ 258.012048] ------------[ cut here ]------------
> [ 258.021206] WARNING: CPU: 0 PID: 280 at fs/sysfs/group.c:220 sysfs_remove_group+0xb4/0xb8()
> [ 258.031728] sysfs group 80c79200 not found for kobject 'event0'
> [ 258.039383] Modules linked in: lock(O) usb_f_ecm g_ether usb_f_rndis u_ether libcomposite coda ath6kl_sdio ath6kl_core
> [ 258.051098] CPU: 0 PID: 280 Comm: v4l2filter0:src Tainted: G O 3.17.0-rc6-20140925-1+ #10
> [ 258.063318] Backtrace:
> [ 258.066403] [<80012ca4>] (dump_backtrace) from [<80012f94>] (show_stack+0x18/0x1c)
> [ 258.077579] r6:000000dc r5:00000009 r4:d81f7ba8 r3:00000000
> [ 258.084549] [<80012f7c>] (show_stack) from [<807872e4>] (dump_stack+0x24/0x28)
> [ 258.091791] [<807872c0>] (dump_stack) from [<80025140>] (warn_slowpath_common+0x78/0x90)
> [ 258.100770] [<800250c8>] (warn_slowpath_common) from [<80025190>] (warn_slowpath_fmt+0x38/0x40)
> [ 258.109818] r8:00000000 r7:da00a218 r6:da0520f0 r5:00000000 r4:80c79200
> [ 258.116675] [<8002515c>] (warn_slowpath_fmt) from [<8015bb4c>] (sysfs_remove_group+0xb4/0xb8)
> [ 258.125824] r3:80c79200 r2:8098e22c
> [ 258.129463] [<8015ba98>] (sysfs_remove_group) from [<803ec5a4>] (dpm_sysfs_remove+0x54/0x58)
> [ 258.138500] r6:da0520e8 r5:da0520f0 r4:80c79200
> [ 258.143195] [<803ec550>] (dpm_sysfs_remove) from [<803e3664>] (device_del+0x4c/0x1b0)
> [ 258.151790] r6:da052004 r5:da0520e8 r4:da052000 r3:da306200
> [ 258.157813] [<803e3618>] (device_del) from [<804eb7a8>] (evdev_disconnect+0x20/0x48)
> [ 258.166190] r7:da00a1b4 r6:da052004 r5:da0520e8 r4:da052000
> [ 258.172637] [<804eb788>] (evdev_disconnect) from [<804e694c>] (__input_unregister_device+0xb0/0x150)
> [ 258.182282] r6:da00a000 r5:da00a448 r4:da00a434 r3:804eb788
> [ 258.188064] [<804e689c>] (__input_unregister_device) from [<804e7b50>] (input_unregister_device+0x50/0x78)
> [ 258.198271] r7:da051c00 r6:da009000 r5:81506254 r4:da00a000
> [ 258.204013] [<804e7b00>] (input_unregister_device) from [<8052eba8>] (uvc_status_cleanup+0x38/0x3c)
> [ 258.213557] r4:da009000 r3:00000000
> [ 258.217221] [<8052eb70>] (uvc_status_cleanup) from [<80524e64>] (uvc_delete+0x28/0x140)
> [ 258.225704] r4:da051c58 r3:00000000
> [ 258.229322] [<80524e3c>] (uvc_delete) from [<80525098>] (uvc_release+0x40/0x44)
> [ 258.237136] r8:00000000 r7:da051c00 r6:da009428 r5:81506254 r4:da051c58 r3:da00951c
> [ 258.245495] [<80525058>] (uvc_release) from [<80500a0c>] (v4l2_device_release+0xd0/0xf4)
> [ 258.253608] [<8050093c>] (v4l2_device_release) from [<803e30f4>] (device_release+0x34/0x98)
> [ 258.262529] r8:da054070 r7:da026a40 r6:da021c00 r5:da051c58 r4:da051c60 r3:8050093c
> [ 258.270519] [<803e30c0>] (device_release) from [<80323fd4>] (kobject_cleanup+0x98/0x1b8)
> [ 258.279105] r6:80c78848 r5:da051c60 r4:80cb61e8 r3:803e30c0
> [ 258.284887] [<80323f3c>] (kobject_cleanup) from [<80323e6c>] (kobject_put+0x50/0x7c)
> [ 258.292634] r7:da054070 r6:da562258 r5:00000000 r4:da051c60
> [ 258.298839] [<80323e1c>] (kobject_put) from [<803e350c>] (put_device+0x1c/0x20)
> [ 258.306654] r4:da051c00
> [ 258.309221] [<803e34f0>] (put_device) from [<804ff73c>] (v4l2_release+0x58/0x7c)
> [ 258.317133] [<804ff6e4>] (v4l2_release) from [<800f1444>] (__fput+0x9c/0x220)
> [ 258.324554] r5:da15e190 r4:da3c8dc0
> [ 258.328171] [<800f13a8>] (__fput) from [<800f1624>] (____fput+0x10/0x14)
> [ 258.335344] r10:da306200 r9:da30c620 r8:00418004 r7:da306200 r6:80cc2180 r5:da3ee280
> [ 258.343252] r4:da306564
> [ 258.346086] [<800f1614>] (____fput) from [<8003d198>] (task_work_run+0xa0/0xe4)
> [ 258.353407] [<8003d0f8>] (task_work_run) from [<80025cb8>] (do_exit+0x280/0x8d0)
> [ 258.361489] r7:da30c624 r6:da3c229c r5:da306574 r4:da3c2240
> [ 258.367266] [<80025a38>] (do_exit) from [<8002722c>] (do_group_exit+0x44/0xb8)
> [ 258.375011] r7:da30c624
> [ 258.377584] [<800271e8>] (do_group_exit) from [<80031510>] (get_signal+0x254/0x6c8)
> [ 258.385736] r7:da30c624 r6:d81f7ed4 r5:00000009 r4:d81f6000
> [ 258.391476] [<800312bc>] (get_signal) from [<80012190>] (do_signal+0x6c/0x3f4)
> [ 258.399230] r10:00000000 r9:d81f6000 r8:fffffe00 r7:d81f7ec0 r6:76ca6de6 r5:76ca6de4
> [ 258.407190] r4:d81f7fb0
> [ 258.409751] [<80012124>] (do_signal) from [<800126c4>] (do_work_pending+0xa8/0xe8)
> [ 258.418003] r10:00000000 r9:d81f6000 r8:8000f3a4 r7:d81f7fb0 r6:8000f3a4 r5:d81f6000
> [ 258.425959] r4:d81f6008
> [ 258.428519] [<8001261c>] (do_work_pending) from [<8000f238>] (work_pending+0xc/0x20)
> [ 258.436967] r7:00000036 r6:756065a8 r5:0193d3f8 r4:76b77b24
> [ 258.442692] ---[ end trace cd2cc911d2f600ac ]---
> [ 258.481579] ------------[ cut here ]------------
> [ 258.487313] WARNING: CPU: 0 PID: 280 at fs/sysfs/group.c:220 sysfs_remove_group+0xb4/0xb8()
> [ 258.496077] sysfs group 80c79200 not found for kobject 'input0'
> [ 258.502005] Modules linked in: lock(O) usb_f_ecm g_ether usb_f_rndis u_ether libcomposite coda ath6kl_sdio ath6kl_core
> [ 258.513158] CPU: 0 PID: 280 Comm: v4l2filter0:src Tainted: G W O 3.17.0-rc6-20140925-1+ #10
> [ 258.523587] Backtrace:
> [ 258.526208] [<80012ca4>] (dump_backtrace) from [<80012f94>] (show_stack+0x18/0x1c)
> [ 258.533914] r6:000000dc r5:00000009 r4:d81f7bc8 r3:00000000
> [ 258.540589] [<80012f7c>] (show_stack) from [<807872e4>] (dump_stack+0x24/0x28)
> [ 258.548471] [<807872c0>] (dump_stack) from [<80025140>] (warn_slowpath_common+0x78/0x90)
> [ 258.557029] [<800250c8>] (warn_slowpath_common) from [<80025190>] (warn_slowpath_fmt+0x38/0x40)
> [ 258.566077] r8:00000000 r7:da051020 r6:da00a220 r5:00000000 r4:80c79200
> [ 258.572879] [<8002515c>] (warn_slowpath_fmt) from [<8015bb4c>] (sysfs_remove_group+0xb4/0xb8)
> [ 258.581992] r3:80c79200 r2:8098e22c
> [ 258.585681] [<8015ba98>] (sysfs_remove_group) from [<803ec5a4>] (dpm_sysfs_remove+0x54/0x58)
> [ 258.594810] r6:da00a218 r5:da00a220 r4:80c79200
> [ 258.599506] [<803ec550>] (dpm_sysfs_remove) from [<803e3664>] (device_del+0x4c/0x1b0)
> [ 258.607982] r6:da00a000 r5:da00a218 r4:00000008 r3:da306200
> [ 258.613738] [<803e3618>] (device_del) from [<804e69d0>] (__input_unregister_device+0x134/0x150)
> [ 258.623046] r7:da00a1b4 r6:da00a000 r5:00000007 r4:00000008
> [ 258.629199] [<804e689c>] (__input_unregister_device) from [<804e7b50>] (input_unregister_device+0x50/0x78)
> [ 258.639498] r7:da051c00 r6:da009000 r5:81506254 r4:da00a000
> [ 258.646041] [<804e7b00>] (input_unregister_device) from [<8052eba8>] (uvc_status_cleanup+0x38/0x3c)
> [ 258.655588] r4:da009000 r3:00000000
> [ 258.659207] [<8052eb70>] (uvc_status_cleanup) from [<80524e64>] (uvc_delete+0x28/0x140)
> [ 258.667690] r4:da051c58 r3:00000000
> [ 258.671308] [<80524e3c>] (uvc_delete) from [<80525098>] (uvc_release+0x40/0x44)
> [ 258.679116] r8:00000000 r7:da051c00 r6:da009428 r5:81506254 r4:da051c58 r3:da00951c
> [ 258.687002] [<80525058>] (uvc_release) from [<80500a0c>] (v4l2_device_release+0xd0/0xf4)
> [ 258.695592] [<8050093c>] (v4l2_device_release) from [<803e30f4>] (device_release+0x34/0x98)
> [ 258.703953] r8:da054070 r7:da026a40 r6:da021c00 r5:da051c58 r4:da051c60 r3:8050093c
> [ 258.712128] [<803e30c0>] (device_release) from [<80323fd4>] (kobject_cleanup+0x98/0x1b8)
> [ 258.720734] r6:80c78848 r5:da051c60 r4:80cb61e8 r3:803e30c0
> [ 258.726516] [<80323f3c>] (kobject_cleanup) from [<80323e6c>] (kobject_put+0x50/0x7c)
> [ 258.734731] r7:da054070 r6:da562258 r5:00000000 r4:da051c60
> [ 258.740463] [<80323e1c>] (kobject_put) from [<803e350c>] (put_device+0x1c/0x20)
> [ 258.748243] r4:da051c00
> [ 258.750807] [<803e34f0>] (put_device) from [<804ff73c>] (v4l2_release+0x58/0x7c)
> [ 258.758684] [<804ff6e4>] (v4l2_release) from [<800f1444>] (__fput+0x9c/0x220)
> [ 258.766125] r5:da15e190 r4:da3c8dc0
> [ 258.769743] [<800f13a8>] (__fput) from [<800f1624>] (____fput+0x10/0x14)
> [ 258.776915] r10:da306200 r9:da30c620 r8:00418004 r7:da306200 r6:80cc2180 r5:da3ee280
> [ 258.785114] r4:da306564
> [ 258.787687] [<800f1614>] (____fput) from [<8003d198>] (task_work_run+0xa0/0xe4)
> [ 258.795532] [<8003d0f8>] (task_work_run) from [<80025cb8>] (do_exit+0x280/0x8d0)
> [ 258.802936] r7:da30c624 r6:da3c229c r5:da306574 r4:da3c2240
> [ 258.808947] [<80025a38>] (do_exit) from [<8002722c>] (do_group_exit+0x44/0xb8)
> [ 258.816648] r7:da30c624
> [ 258.819219] [<800271e8>] (do_group_exit) from [<80031510>] (get_signal+0x254/0x6c8)
> [ 258.827360] r7:da30c624 r6:d81f7ed4 r5:00000009 r4:d81f6000
> [ 258.833098] [<800312bc>] (get_signal) from [<80012190>] (do_signal+0x6c/0x3f4)
> [ 258.840828] r10:00000000 r9:d81f6000 r8:fffffe00 r7:d81f7ec0 r6:76ca6de6 r5:76ca6de4
> [ 258.848786] r4:d81f7fb0
> [ 258.851346] [<80012124>] (do_signal) from [<800126c4>] (do_work_pending+0xa8/0xe8)
> [ 258.859609] r10:00000000 r9:d81f6000 r8:8000f3a4 r7:d81f7fb0 r6:8000f3a4 r5:d81f6000
> [ 258.867567] r4:d81f6008
> [ 258.870126] [<8001261c>] (do_work_pending) from [<8000f238>] (work_pending+0xc/0x20)
> [ 258.878543] r7:00000036 r6:756065a8 r5:0193d3f8 r4:76b77b24
> [ 258.884530] ---[ end trace cd2cc911d2f600ad ]---
> [ 258.892863] ------------[ cut here ]------------
> [ 258.898189] WARNING: CPU: 0 PID: 280 at fs/sysfs/group.c:220 sysfs_remove_group+0xb4/0xb8()
> [ 258.906811] sysfs group 80c8a764 not found for kobject 'input0'
> [ 258.912736] Modules linked in: lock(O) usb_f_ecm g_ether usb_f_rndis u_ether libcomposite coda ath6kl_sdio ath6kl_core
> [ 258.923850] CPU: 0 PID: 280 Comm: v4l2filter0:src Tainted: G W O 3.17.0-rc6-20140925-1+ #10
> [ 258.933569] Backtrace:
> [ 258.936097] [<80012ca4>] (dump_backtrace) from [<80012f94>] (show_stack+0x18/0x1c)
> [ 258.943671] r6:000000dc r5:00000009 r4:d81f7bb0 r3:00000000
> [ 258.949877] [<80012f7c>] (show_stack) from [<807872e4>] (dump_stack+0x24/0x28)
> [ 258.957588] [<807872c0>] (dump_stack) from [<80025140>] (warn_slowpath_common+0x78/0x90)
> [ 258.965957] [<800250c8>] (warn_slowpath_common) from [<80025190>] (warn_slowpath_fmt+0x38/0x40)
> [ 258.974918] r8:00000000 r7:80c8a578 r6:da00a220 r5:00000000 r4:80c8a764
> [ 258.981703] [<8002515c>] (warn_slowpath_fmt) from [<8015bb4c>] (sysfs_remove_group+0xb4/0xb8)
> [ 258.990724] r3:80c8a764 r2:8098e22c
> [ 258.994444] [<8015ba98>] (sysfs_remove_group) from [<8015bc04>] (sysfs_remove_groups+0x2c/0x3c)
> [ 259.003147] r6:80c8a590 r5:da00a220 r4:80c8a624
> [ 259.008319] [<8015bbd8>] (sysfs_remove_groups) from [<803e303c>] (device_remove_attrs+0x58/0x74)
> [ 259.017585] r5:da00a220 r4:da00a218
> [ 259.021207] [<803e2fe4>] (device_remove_attrs) from [<803e372c>] (device_del+0x114/0x1b0)
> [ 259.029860] r7:da051020 r6:da00a220 r5:da00a218 r4:dad9be5c
> [ 259.035642] [<803e3618>] (device_del) from [<804e69d0>] (__input_unregister_device+0x134/0x150)
> [ 259.044806] r7:da00a1b4 r6:da00a000 r5:00000007 r4:00000008
> [ 259.050541] [<804e689c>] (__input_unregister_device) from [<804e7b50>] (input_unregister_device+0x50/0x78)
> [ 259.060693] r7:da051c00 r6:da009000 r5:81506254 r4:da00a000
> [ 259.066505] [<804e7b00>] (input_unregister_device) from [<8052eba8>] (uvc_status_cleanup+0x38/0x3c)
> [ 259.076023] r4:da009000 r3:00000000
> [ 259.079642] [<8052eb70>] (uvc_status_cleanup) from [<80524e64>] (uvc_delete+0x28/0x140)
> [ 259.088106] r4:da051c58 r3:00000000
> [ 259.091722] [<80524e3c>] (uvc_delete) from [<80525098>] (uvc_release+0x40/0x44)
> [ 259.099491] r8:00000000 r7:da051c00 r6:da009428 r5:81506254 r4:da051c58 r3:da00951c
> [ 259.107368] [<80525058>] (uvc_release) from [<80500a0c>] (v4l2_device_release+0xd0/0xf4)
> [ 259.115928] [<8050093c>] (v4l2_device_release) from [<803e30f4>] (device_release+0x34/0x98)
> [ 259.124546] r8:da054070 r7:da026a40 r6:da021c00 r5:da051c58 r4:da051c60 r3:8050093c
> [ 259.132381] [<803e30c0>] (device_release) from [<80323fd4>] (kobject_cleanup+0x98/0x1b8)
> [ 259.140968] r6:80c78848 r5:da051c60 r4:80cb61e8 r3:803e30c0
> [ 259.146747] [<80323f3c>] (kobject_cleanup) from [<80323e6c>] (kobject_put+0x50/0x7c)
> [ 259.154978] r7:da054070 r6:da562258 r5:00000000 r4:da051c60
> [ 259.160711] [<80323e1c>] (kobject_put) from [<803e350c>] (put_device+0x1c/0x20)
> [ 259.168496] r4:da051c00
> [ 259.171060] [<803e34f0>] (put_device) from [<804ff73c>] (v4l2_release+0x58/0x7c)
> [ 259.178935] [<804ff6e4>] (v4l2_release) from [<800f1444>] (__fput+0x9c/0x220)
> [ 259.186343] r5:da15e190 r4:da3c8dc0
> [ 259.189959] [<800f13a8>] (__fput) from [<800f1624>] (____fput+0x10/0x14)
> [ 259.197161] r10:da306200 r9:da30c620 r8:00418004 r7:da306200 r6:80cc2180 r5:da3ee280
> [ 259.205361] r4:da306564
> [ 259.207932] [<800f1614>] (____fput) from [<8003d198>] (task_work_run+0xa0/0xe4)
> [ 259.215734] [<8003d0f8>] (task_work_run) from [<80025cb8>] (do_exit+0x280/0x8d0)
> [ 259.223137] r7:da30c624 r6:da3c229c r5:da306574 r4:da3c2240
> [ 259.229130] [<80025a38>] (do_exit) from [<8002722c>] (do_group_exit+0x44/0xb8)
> [ 259.236844] r7:da30c624
> [ 259.239410] [<800271e8>] (do_group_exit) from [<80031510>] (get_signal+0x254/0x6c8)
> [ 259.247760] r7:da30c624 r6:d81f7ed4 r5:00000009 r4:d81f6000
> [ 259.253505] [<800312bc>] (get_signal) from [<80012190>] (do_signal+0x6c/0x3f4)
> [ 259.261226] r10:00000000 r9:d81f6000 r8:fffffe00 r7:d81f7ec0 r6:76ca6de6 r5:76ca6de4
> [ 259.269215] r4:d81f7fb0
> [ 259.271773] [<80012124>] (do_signal) from [<800126c4>] (do_work_pending+0xa8/0xe8)
> [ 259.280054] r10:00000000 r9:d81f6000 r8:8000f3a4 r7:d81f7fb0 r6:8000f3a4 r5:d81f6000
> [ 259.288010] r4:d81f6008
> [ 259.290568] [<8001261c>] (do_work_pending) from [<8000f238>] (work_pending+0xc/0x20)
> [ 259.298977] r7:00000036 r6:756065a8 r5:0193d3f8 r4:76b77b24
> [ 259.304748] ---[ end trace cd2cc911d2f600ae ]---
> [ 259.313908] ------------[ cut here ]------------
> [ 259.319437] WARNING: CPU: 0 PID: 280 at fs/sysfs/group.c:220 sysfs_remove_group+0xb4/0xb8()
> [ 259.328075] sysfs group 80c8a630 not found for kobject 'input0'
> [ 259.334001] Modules linked in: lock(O) usb_f_ecm g_ether usb_f_rndis u_ether libcomposite coda ath6kl_sdio ath6kl_core
> [ 259.345180] CPU: 0 PID: 280 Comm: v4l2filter0:src Tainted: G W O 3.17.0-rc6-20140925-1+ #10
> [ 259.354876] Backtrace:
> [ 259.357359] [<80012ca4>] (dump_backtrace) from [<80012f94>] (show_stack+0x18/0x1c)
> [ 259.365406] r6:000000dc r5:00000009 r4:d81f7bb0 r3:00000000
> [ 259.371147] [<80012f7c>] (show_stack) from [<807872e4>] (dump_stack+0x24/0x28)
> [ 259.378856] [<807872c0>] (dump_stack) from [<80025140>] (warn_slowpath_common+0x78/0x90)
> [ 259.387252] [<800250c8>] (warn_slowpath_common) from [<80025190>] (warn_slowpath_fmt+0x38/0x40)
> [ 259.396262] r8:00000000 r7:80c8a578 r6:da00a220 r5:00000000 r4:80c8a630
> [ 259.403049] [<8002515c>] (warn_slowpath_fmt) from [<8015bb4c>] (sysfs_remove_group+0xb4/0xb8)
> [ 259.412058] r3:80c8a630 r2:8098e22c
> [ 259.415748] [<8015ba98>] (sysfs_remove_group) from [<8015bc04>] (sysfs_remove_groups+0x2c/0x3c)
> [ 259.424924] r6:80c8a590 r5:da00a220 r4:80c8a628
> [ 259.429604] [<8015bbd8>] (sysfs_remove_groups) from [<803e303c>] (device_remove_attrs+0x58/0x74)
> [ 259.438873] r5:da00a220 r4:da00a218
> [ 259.442494] [<803e2fe4>] (device_remove_attrs) from [<803e372c>] (device_del+0x114/0x1b0)
> [ 259.451143] r7:da051020 r6:da00a220 r5:da00a218 r4:dad9be5c
> [ 259.459353] [<803e3618>] (device_del) from [<804e69d0>] (__input_unregister_device+0x134/0x150)
> [ 259.468788] r7:da00a1b4 r6:da00a000 r5:00000007 r4:00000008
> [ 259.474673] [<804e689c>] (__input_unregister_device) from [<804e7b50>] (input_unregister_device+0x50/0x78)
> [ 259.484912] r7:da051c00 r6:da009000 r5:81506254 r4:da00a000
> [ 259.490656] [<804e7b00>] (input_unregister_device) from [<8052eba8>] (uvc_status_cleanup+0x38/0x3c)
> [ 259.500189] r4:da009000 r3:00000000
> [ 259.503808] [<8052eb70>] (uvc_status_cleanup) from [<80524e64>] (uvc_delete+0x28/0x140)
> [ 259.512287] r4:da051c58 r3:00000000
> [ 259.515948] [<80524e3c>] (uvc_delete) from [<80525098>] (uvc_release+0x40/0x44)
> [ 259.523260] r8:00000000 r7:da051c00 r6:da009428 r5:81506254 r4:da051c58 r3:da00951c
> [ 259.531558] [<80525058>] (uvc_release) from [<80500a0c>] (v4l2_device_release+0xd0/0xf4)
> [ 259.540130] [<8050093c>] (v4l2_device_release) from [<803e30f4>] (device_release+0x34/0x98)
> [ 259.548753] r8:da054070 r7:da026a40 r6:da021c00 r5:da051c58 r4:da051c60 r3:8050093c
> [ 259.556668] [<803e30c0>] (device_release) from [<80323fd4>] (kobject_cleanup+0x98/0x1b8)
> [ 259.565261] r6:80c78848 r5:da051c60 r4:80cb61e8 r3:803e30c0
> [ 259.570995] [<80323f3c>] (kobject_cleanup) from [<80323e6c>] (kobject_put+0x50/0x7c)
> [ 259.579214] r7:da054070 r6:da562258 r5:00000000 r4:da051c60
> [ 259.584993] [<80323e1c>] (kobject_put) from [<803e350c>] (put_device+0x1c/0x20)
> [ 259.592305] r4:da051c00
> [ 259.595383] [<803e34f0>] (put_device) from [<804ff73c>] (v4l2_release+0x58/0x7c)
> [ 259.602793] [<804ff6e4>] (v4l2_release) from [<800f1444>] (__fput+0x9c/0x220)
> [ 259.610614] r5:da15e190 r4:da3c8dc0
> [ 259.614503] [<800f13a8>] (__fput) from [<800f1624>] (____fput+0x10/0x14)
> [ 259.621212] r10:da306200 r9:da30c620 r8:00418004 r7:da306200 r6:80cc2180 r5:da3ee280
> [ 259.629413] r4:da306564
> [ 259.631980] [<800f1614>] (____fput) from [<8003d198>] (task_work_run+0xa0/0xe4)
> [ 259.639994] [<8003d0f8>] (task_work_run) from [<80025cb8>] (do_exit+0x280/0x8d0)
> [ 259.647692] r7:da30c624 r6:da3c229c r5:da306574 r4:da3c2240
> [ 259.653422] [<80025a38>] (do_exit) from [<8002722c>] (do_group_exit+0x44/0xb8)
> [ 259.661117] r7:da30c624
> [ 259.663688] [<800271e8>] (do_group_exit) from [<80031510>] (get_signal+0x254/0x6c8)
> [ 259.671819] r7:da30c624 r6:d81f7ed4 r5:00000009 r4:d81f6000
> [ 259.677600] [<800312bc>] (get_signal) from [<80012190>] (do_signal+0x6c/0x3f4)
> [ 259.685289] r10:00000000 r9:d81f6000 r8:fffffe00 r7:d81f7ec0 r6:76ca6de6 r5:76ca6de4
> [ 259.693197] r4:d81f7fb0
> [ 259.696049] [<80012124>] (do_signal) from [<800126c4>] (do_work_pending+0xa8/0xe8)
> [ 259.703623] r10:00000000 r9:d81f6000 r8:8000f3a4 r7:d81f7fb0 r6:8000f3a4 r5:d81f6000
> [ 259.712000] r4:d81f6008
> [ 259.714816] [<8001261c>] (do_work_pending) from [<8000f238>] (work_pending+0xc/0x20)
> [ 259.722563] r7:00000036 r6:756065a8 r5:0193d3f8 r4:76b77b24
> [ 259.728745] ---[ end trace cd2cc911d2f600af ]---
> [ 259.735876] deleting dev: da0090a8
> [ 259.739317] in sysfs_remove_group: power
> [ 259.743245] ------------[ cut here ]------------
> [ 259.748707] WARNING: CPU: 0 PID: 280 at fs/sysfs/group.c:220 sysfs_remove_group+0xb4/0xb8()
> [ 259.757392] sysfs group 80c79200 not found for kobject 'media1'
> [ 259.763319] Modules linked in: lock(O) usb_f_ecm g_ether usb_f_rndis u_ether libcomposite coda ath6kl_sdio ath6kl_core
> [ 259.774565] CPU: 0 PID: 280 Comm: v4l2filter0:src Tainted: G W O 3.17.0-rc6-20140925-1+ #10
> [ 259.783788] Backtrace:
> [ 259.786771] [<80012ca4>] (dump_backtrace) from [<80012f94>] (show_stack+0x18/0x1c)
> [ 259.794880] r6:000000dc r5:00000009 r4:d81f7bc8 r3:00000000
> [ 259.800622] [<80012f7c>] (show_stack) from [<807872e4>] (dump_stack+0x24/0x28)
> [ 259.808395] [<807872c0>] (dump_stack) from [<80025140>] (warn_slowpath_common+0x78/0x90)
> [ 259.816778] [<800250c8>] (warn_slowpath_common) from [<80025190>] (warn_slowpath_fmt+0x38/0x40)
> [ 259.825750] r8:00000000 r7:da051020 r6:da0090b0 r5:00000000 r4:80c79200
> [ 259.832537] [<8002515c>] (warn_slowpath_fmt) from [<8015bb4c>] (sysfs_remove_group+0xb4/0xb8)
> [ 259.841570] r3:80c79200 r2:8098e22c
> [ 259.845245] [<8015ba98>] (sysfs_remove_group) from [<803ec5a4>] (dpm_sysfs_remove+0x54/0x58)
> [ 259.853687] r6:da0090a8 r5:da0090b0 r4:80c79200
> [ 259.858846] [<803ec550>] (dpm_sysfs_remove) from [<803e3664>] (device_del+0x4c/0x1b0)
> [ 259.867159] r6:da009098 r5:da0090a8 r4:da0090a8 r3:da306200
> [ 259.872893] [<803e3618>] (device_del) from [<803e37f4>] (device_unregister+0x2c/0x6c)
> [ 259.881206] r7:da051c00 r6:da009098 r5:da00939c r4:da0090a8
> [ 259.886987] [<803e37c8>] (device_unregister) from [<804fe768>] (media_devnode_unregister+0x58/0x5c)
> [ 259.896543] r4:da0090a0 r3:600f0013
> [ 259.900164] [<804fe710>] (media_devnode_unregister) from [<804fe330>] (media_device_unregister+0x50/0x54)
> [ 259.910260] r4:da00939c r3:00000001
> [ 259.913881] [<804fe2e0>] (media_device_unregister) from [<80524f74>] (uvc_delete+0x138/0x140)
> [ 259.922900] r6:da009000 r5:81506254 r4:da051c58 r3:00000001
> [ 259.928674] [<80524e3c>] (uvc_delete) from [<80525098>] (uvc_release+0x40/0x44)
> [ 259.936451] r8:00000000 r7:da051c00 r6:da009428 r5:81506254 r4:da051c58 r3:da00951c
> [ 259.944539] [<80525058>] (uvc_release) from [<80500a0c>] (v4l2_device_release+0xd0/0xf4)
> [ 259.952645] [<8050093c>] (v4l2_device_release) from [<803e30f4>] (device_release+0x34/0x98)
> [ 259.961478] r8:da054070 r7:da026a40 r6:da021c00 r5:da051c58 r4:da051c60 r3:8050093c
> [ 259.969371] [<803e30c0>] (device_release) from [<80323fd4>] (kobject_cleanup+0x98/0x1b8)
> [ 259.977967] r6:80c78848 r5:da051c60 r4:80cb61e8 r3:803e30c0
> [ 259.983702] [<80323f3c>] (kobject_cleanup) from [<80323e6c>] (kobject_put+0x50/0x7c)
> [ 259.991921] r7:da054070 r6:da562258 r5:00000000 r4:da051c60
> [ 259.997738] [<80323e1c>] (kobject_put) from [<803e350c>] (put_device+0x1c/0x20)
> [ 260.005531] r4:da051c00
> [ 260.008096] [<803e34f0>] (put_device) from [<804ff73c>] (v4l2_release+0x58/0x7c)
> [ 260.015976] [<804ff6e4>] (v4l2_release) from [<800f1444>] (__fput+0x9c/0x220)
> [ 260.023119] r5:da15e190 r4:da3c8dc0
> [ 260.027004] [<800f13a8>] (__fput) from [<800f1624>] (____fput+0x10/0x14)
> [ 260.033709] r10:da306200 r9:da30c620 r8:00418004 r7:da306200 r6:80cc2180 r5:da3ee280
> [ 260.042078] r4:da306564
> [ 260.044936] [<800f1614>] (____fput) from [<8003d198>] (task_work_run+0xa0/0xe4)
> [ 260.052257] [<8003d0f8>] (task_work_run) from [<80025cb8>] (do_exit+0x280/0x8d0)
> [ 260.060365] r7:da30c624 r6:da3c229c r5:da306574 r4:da3c2240
> [ 260.066144] [<80025a38>] (do_exit) from [<8002722c>] (do_group_exit+0x44/0xb8)
> [ 260.073369] r7:da30c624
> [ 260.076398] [<800271e8>] (do_group_exit) from [<80031510>] (get_signal+0x254/0x6c8)
> [ 260.084059] r7:da30c624 r6:d81f7ed4 r5:00000009 r4:d81f6000
> [ 260.090262] [<800312bc>] (get_signal) from [<80012190>] (do_signal+0x6c/0x3f4)
> [ 260.097955] r10:00000000 r9:d81f6000 r8:fffffe00 r7:d81f7ec0 r6:76ca6de6 r5:76ca6de4
> [ 260.105910] r4:d81f7fb0
> [ 260.108469] [<80012124>] (do_signal) from [<800126c4>] (do_work_pending+0xa8/0xe8)
> [ 260.116728] r10:00000000 r9:d81f6000 r8:8000f3a4 r7:d81f7fb0 r6:8000f3a4 r5:d81f6000
> [ 260.124899] r4:d81f6008
> [ 260.127463] [<8001261c>] (do_work_pending) from [<8000f238>] (work_pending+0xc/0x20)
> [ 260.135694] r7:00000036 r6:756065a8 r5:0193d3f8 r4:76b77b24
> [ 260.141419] ---[ end trace cd2cc911d2f600b0 ]---
> ---
> drivers/media/usb/uvc/uvc_driver.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index f8135f4..b58e46a 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -1626,15 +1626,10 @@ static void uvc_delete(struct uvc_device *dev)
> usb_put_intf(dev->intf);
> usb_put_dev(dev->udev);
>
> - uvc_status_cleanup(dev);
> uvc_ctrl_cleanup_device(dev);
>
> if (dev->vdev.dev)
> v4l2_device_unregister(&dev->vdev);
> -#ifdef CONFIG_MEDIA_CONTROLLER
> - if (media_devnode_is_registered(&dev->mdev.devnode))
> - media_device_unregister(&dev->mdev);
> -#endif
>
> list_for_each_safe(p, n, &dev->chains) {
> struct uvc_video_chain *chain;
> @@ -1705,6 +1700,11 @@ static void uvc_unregister_video(struct uvc_device *dev)
> uvc_debugfs_cleanup_stream(stream);
> }
>
> + uvc_status_cleanup(dev);
> +#ifdef CONFIG_MEDIA_CONTROLLER
> + if (media_devnode_is_registered(&dev->mdev.devnode))
> + media_device_unregister(&dev->mdev);
> +#endif
> /* Decrement the stream count and call uvc_delete explicitly if there
> * are no stream left.
> */
> --
> 2.1.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
