Robert,
I just tried your 3.14.4-bone4 kernel. Thanks for including my
Argus UPS cape patches:-) . It appears that the UVC DMA is getting
better, but I am getting the following warning messages when I issue any
UVC controls. The good news is that the system still continues to work
fine apart from these messages. Close, but no cigar :-\
Please pass on words of encouragement to the developers responsible for
this.
Regards,
Dave.
On 03/14/2014 11:20 AM, Robert Nelson wrote:
On Fri, Mar 14, 2014 at 11:14 AM, David Lambert <d...@lambsys.com> wrote:
The USB DMA still appears to have problems when used with USB cameras. It
appears that whenever I attempt to issue controls via UVC to a camera that
is capturing, then I get the attached crash. PIO mode works fine. Could I
suggest that the default defconfig selects PIO mode until DMA mode works
reliably?
I hope this is the right place to post. If not, please excuse my intrusion,
and suggest another.
Done:
https://github.com/RobertCNelson/linux-dev/commit/182589dcccc51ae7ecc82c1ba9ef2b6440edf2d9
I don't see it getting completely fixed anytime soon either
Regards,
uname -a
Linux trax-jdal 3.14.4-bone4 #1 SMP Mon May 19 15:25:52 CDT 2014 armv7l
GNU/Linux
root@trax-jdal:~# [ 238.501234] ------------[ cut here ]------------
[ 238.506128] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:605
cppi41_dma_control+0x2a0/0x2f0()
[ 238.515429] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 238.540705] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 238.548403] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 238.556539] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 238.564121] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 238.572607] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 238.581822] [<c003f0cc>] (warn_slowpath_null) from [<c03bc900>]
(cppi41_dma_control+0x2a0/0x2f0)
[ 238.591051] [<c03bc900>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 238.600723] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 238.610942] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 238.620440] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 238.629292] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 238.637818] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 238.647147] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 238.657926] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 238.668979] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 238.678742] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 238.686872] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 238.694813] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 238.702484] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 238.710420] ---[ end trace 4b907c08f9a1b69e ]---
[ 238.715257] ------------[ cut here ]------------
[ 238.720099] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:629
cppi41_dma_control+0x28c/0x2f0()
[ 238.729397] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 238.754654] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 238.762324] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 238.770448] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 238.778024] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 238.786509] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 238.795722] [<c003f0cc>] (warn_slowpath_null) from [<c03bc8ec>]
(cppi41_dma_control+0x28c/0x2f0)
[ 238.804939] [<c03bc8ec>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 238.814611] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 238.824829] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 238.834317] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 238.843169] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 238.851664] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 238.860986] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 238.871765] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 238.882809] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 238.892571] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 238.900693] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 238.908633] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 238.916300] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 238.924234] ---[ end trace 4b907c08f9a1b69f ]---
[ 238.929342] ------------[ cut here ]------------
[ 238.934199] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:605
cppi41_dma_control+0x2a0/0x2f0()
[ 238.943499] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 238.968758] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 238.976432] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 238.984559] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 238.992136] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 239.000621] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 239.009835] [<c003f0cc>] (warn_slowpath_null) from [<c03bc900>]
(cppi41_dma_control+0x2a0/0x2f0)
[ 239.019053] [<c03bc900>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 239.028725] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 239.038943] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 239.048434] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 239.057284] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 239.065787] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 239.075110] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 239.085890] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 239.096936] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 239.106697] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 239.114820] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 239.122761] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 239.130429] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 239.138364] ---[ end trace 4b907c08f9a1b6a0 ]---
[ 239.143200] ------------[ cut here ]------------
[ 239.148041] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:629
cppi41_dma_control+0x28c/0x2f0()
[ 239.157339] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 239.182592] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 239.190261] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 239.198384] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 239.205961] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 239.214446] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 239.223660] [<c003f0cc>] (warn_slowpath_null) from [<c03bc8ec>]
(cppi41_dma_control+0x28c/0x2f0)
[ 239.232875] [<c03bc8ec>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 239.242546] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 239.252764] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 239.262252] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 239.271102] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 239.279598] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 239.288921] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 239.299700] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 239.310744] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 239.320505] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 239.328627] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 239.336566] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 239.344233] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 239.352166] ---[ end trace 4b907c08f9a1b6a1 ]---
[ 239.357604] ------------[ cut here ]------------
[ 239.362470] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:605
cppi41_dma_control+0x2a0/0x2f0()
[ 239.371771] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 239.397035] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 239.404716] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 239.412846] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 239.420424] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 239.428910] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 239.438124] [<c003f0cc>] (warn_slowpath_null) from [<c03bc900>]
(cppi41_dma_control+0x2a0/0x2f0)
[ 239.447345] [<c03bc900>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 239.457017] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 239.467234] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 239.476725] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 239.485576] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 239.494085] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 239.503410] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 239.514189] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 239.525237] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 239.534999] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 239.543123] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 239.551065] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 239.558733] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 239.566668] ---[ end trace 4b907c08f9a1b6a2 ]---
[ 239.571503] ------------[ cut here ]------------
[ 239.576344] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:629
cppi41_dma_control+0x28c/0x2f0()
[ 239.585642] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 239.610896] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 239.618565] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 239.626689] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 239.634265] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 239.642750] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 239.651964] [<c003f0cc>] (warn_slowpath_null) from [<c03bc8ec>]
(cppi41_dma_control+0x28c/0x2f0)
[ 239.661181] [<c03bc8ec>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 239.670852] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 239.681069] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 239.690559] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 239.699409] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 239.707906] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 239.717227] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 239.728005] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 239.739049] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 239.748810] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 239.756932] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 239.764871] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 239.772539] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 239.780473] ---[ end trace 4b907c08f9a1b6a3 ]---
[ 239.785544] ------------[ cut here ]------------
[ 239.790399] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:605
cppi41_dma_control+0x2a0/0x2f0()
[ 239.799699] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 239.824958] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 239.832632] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 239.840758] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 239.848336] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 239.856821] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 239.866035] [<c003f0cc>] (warn_slowpath_null) from [<c03bc900>]
(cppi41_dma_control+0x2a0/0x2f0)
[ 239.875253] [<c03bc900>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 239.884925] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 239.895142] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 239.904632] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 239.913483] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 239.921984] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 239.931308] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 239.942087] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 239.953132] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 239.962893] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 239.971017] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 239.978956] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 239.986624] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 239.994560] ---[ end trace 4b907c08f9a1b6a4 ]---
[ 239.999395] ------------[ cut here ]------------
[ 240.004235] WARNING: CPU: 0 PID: 498 at drivers/dma/cppi41.c:629
cppi41_dma_control+0x28c/0x2f0()
[ 240.013532] Modules linked in: rtc_ds1307 snd_usb_audio
snd_usbmidi_lib snd_hwdep snd_rawmidi uvcvideo snd_seq_device snd_pcm
videobuf2_vmalloc snd_timer videobuf2_memops snd videobuf2_core
soundcore ftdi_sio usbserial omap_aes omap_sham rtc_omap uio_pdrv_genirq
uio loop
[ 240.038782] CPU: 0 PID: 498 Comm: python Tainted: G W
3.14.4-bone4 #1
[ 240.046451] [<c0015218>] (unwind_backtrace) from [<c0011bbc>]
(show_stack+0x10/0x14)
[ 240.054576] [<c0011bbc>] (show_stack) from [<c06c8788>]
(dump_stack+0x80/0x90)
[ 240.062151] [<c06c8788>] (dump_stack) from [<c003f014>]
(warn_slowpath_common+0x70/0x8c)
[ 240.070637] [<c003f014>] (warn_slowpath_common) from [<c003f0cc>]
(warn_slowpath_null+0x1c/0x24)
[ 240.079850] [<c003f0cc>] (warn_slowpath_null) from [<c03bc8ec>]
(cppi41_dma_control+0x28c/0x2f0)
[ 240.089066] [<c03bc8ec>] (cppi41_dma_control) from [<c04dfa78>]
(cppi41_dma_channel_abort+0xc8/0x13c)
[ 240.098738] [<c04dfa78>] (cppi41_dma_channel_abort) from [<c04db2a8>]
(musb_cleanup_urb.isra.12+0x40/0x10c)
[ 240.108954] [<c04db2a8>] (musb_cleanup_urb.isra.12) from [<c04db5b4>]
(musb_urb_dequeue+0xe8/0x128)
[ 240.118443] [<c04db5b4>] (musb_urb_dequeue) from [<c04c0bd0>]
(usb_hcd_unlink_urb+0x4c/0x84)
[ 240.127294] [<c04c0bd0>] (usb_hcd_unlink_urb) from [<c04c1d74>]
(usb_kill_urb+0x50/0xcc)
[ 240.135791] [<c04c1d74>] (usb_kill_urb) from [<bf0b8c08>]
(uvc_uninit_video+0x34/0x60 [uvcvideo])
[ 240.145113] [<bf0b8c08>] (uvc_uninit_video [uvcvideo]) from
[<bf0baff0>] (uvc_video_enable+0x18/0x168 [uvcvideo])
[ 240.155891] [<bf0baff0>] (uvc_video_enable [uvcvideo]) from
[<bf0b7fbc>] (uvc_v4l2_do_ioctl+0x5b8/0x1180 [uvcvideo])
[ 240.166936] [<bf0b7fbc>] (uvc_v4l2_do_ioctl [uvcvideo]) from
[<c0517560>] (video_usercopy+0x194/0x53c)
[ 240.176697] [<c0517560>] (video_usercopy) from [<c0513344>]
(v4l2_ioctl+0x114/0x13c)
[ 240.184819] [<c0513344>] (v4l2_ioctl) from [<c0156d60>]
(do_vfs_ioctl+0x400/0x5c4)
[ 240.192760] [<c0156d60>] (do_vfs_ioctl) from [<c0156f90>]
(SyS_ioctl+0x6c/0x7c)
[ 240.200426] [<c0156f90>] (SyS_ioctl) from [<c000e1a0>]
(ret_fast_syscall+0x0/0x30)
[ 240.208359] ---[ end trace 4b907c08f9a1b6a5 ]---
--
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