Re: Soft lockup when disconnecting musb isochronous device.

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Op 30 sep 2008, om 08:03 heeft Gupta, Ajay Kumar het volgende geschreven:

I've been trying to get the UVC camera driver working in linux-omap on
the Beagleboard, which uses musb.  With the latest linux-omap git,
capture doesn't work.  Applying Ajay Gupta's MUSB patches posted here
on 9/8 allows capture to work until the device is closed.
With or without Ajay's patches, when the device is closed, the
following lockup occurs. Let me know if there is anything I can do to
help debug this.

Have you applied below patch posted on 25/08/2008?
[PATCH v3] OMAP: MUSB: Corrects urb unlink function path

That patch isn't applied in the uImage Nathan is using, I'm adding it to the patchqueue and will build a new uImage[1]

regards,

Koen

[1] When I can access my buildmachine again, *$(*$(#@*$ rain



This patch is accepted and is pending to be merged with latest OMAP GIT.

Regards,
Ajay


BUG: soft lockup - CPU#0 stuck for 61s! [mjpg_streamer:1770]
Modules linked in: ipv6 pegasus uvcvideo compat_ioctl32 videodev v4l1_compat

Pid: 1770, comm:        mjpg_streamer
CPU: 0    Not tainted  (2.6.27-rc7-omap1 #4)
PC is at __mutex_lock_slowpath+0x1ec/0x204
LR is at __mutex_lock_slowpath+0x1c4/0x204
pc : [<c0320fa0>]    lr : [<c0320f78>]    psr: 60000013
sp : c7265ca0  ip : c7265ca0  fp : c7265cd4
r10: c79eb400  r9 : c7128218  r8 : c78a6a08
r7 : c78df9c0  r6 : 60000013  r5 : c0437690  r4 : c7265ca4
r3 : 00000000  r2 : 00000000  r1 : c7264000  r0 : c0437690
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 00c5387f  Table: 87348018  DAC: 00000015
[<c0034ca8>] (show_regs+0x0/0x50) from [<c007959c>]
(softlockup_tick+0x100/0x140)
r5:000000bc r4:0000007f
[<c007949c>] (softlockup_tick+0x0/0x140) from [<c005c08c>]
(run_local_timers+0x1c/0x20)
[<c005c070>] (run_local_timers+0x0/0x20) from [<c005c4e8>]
(update_process_times+0x30/0x5c)
[<c005c4b8>] (update_process_times+0x0/0x5c) from [<c006f138>]
(tick_sched_timer+0x8c/0xd8)
r5:c7265c58 r4:c044d630
[<c006f0ac>] (tick_sched_timer+0x0/0xd8) from [<c0069090>]
(__run_hrtimer+0x58/0x94)
r7:c0425e60 r6:c044d630 r5:c0425e60 r4:c044d630
[<c0069038>] (__run_hrtimer+0x0/0x94) from [<c0069c64>]
(hrtimer_interrupt+0x130/0x1a0)
r5:000000b9 r4:183847b0
[<c0069b34>] (hrtimer_interrupt+0x0/0x1a0) from [<c003d248>]
(omap2_gp_timer_interrupt+0x28/0x34)
[<c003d220>] (omap2_gp_timer_interrupt+0x0/0x34) from [<c0079a58>]
(handle_IRQ_event+0x3c/0x74)
[<c0079a1c>] (handle_IRQ_event+0x0/0x74) from [<c007b2a4>]
(handle_level_irq+0xd4/0xf0)
r7:c78df9c0 r6:00000000 r5:0000005f r4:c04279a8
[<c007b1d0>] (handle_level_irq+0x0/0xf0) from [<c0033048>]
(__exception_text_start+0x48/0x64)
r5:c04279a8 r4:0000005f
[<c0033000>] (__exception_text_start+0x0/0x64) from [<c0033830>]
(__irq_svc+0x30/0x80)
Exception stack(0xc7265c58 to 0xc7265ca0)
5c40: c0437690 c7264000 5c60: 00000000 00000000 c7265ca4 c0437690 60000013 c78df9c0 c78a6a08 c7128218 5c80: c79eb400 c7265cd4 c7265ca0 c7265ca0 c0320f78 c0320fa0 60000013 ffffffff
r7:c78df9c0 r6:60000013 r5:d8200000 r4:ffffffff
[<c0320db4>] (__mutex_lock_slowpath+0x0/0x204) from [<c0320fc8>]
(mutex_lock+0x10/0x14)
r7:c7893000 r6:c7170c00 r5:c7170c00 r4:c791c738
[<c0320fb8>] (mutex_lock+0x0/0x14) from [<c01ed760>] (usb_kill_urb +0x38/0x104)
[<c01ed728>] (usb_kill_urb+0x0/0x104) from [<c01ece30>]
(usb_hcd_flush_endpoint+0xb0/0xcc)
r6:c791c740 r5:c7170c00 r4:c791c738
[<c01ecd80>] (usb_hcd_flush_endpoint+0x0/0xcc) from [<c01ee044>]
(usb_disable_endpoint+0x5c/0x6c)
r7:c7893000 r6:c78a6a40 r5:c7893000 r4:c791c740
[<c01edfe8>] (usb_disable_endpoint+0x0/0x6c) from [<c01ee180>]
(usb_disable_interface+0x34/0x4c)
r5:00000028 r4:00000001
[<c01ee14c>] (usb_disable_interface+0x0/0x4c) from [<c01ef4e0>]
(usb_set_interface+0xec/0x178)
r7:00000001 r6:00000000 r5:c7893000 r4:c78a6e00
[<c01ef3f4>] (usb_set_interface+0x0/0x178) from [<bf014c48>]
(uvc_video_enable+0x3c/0x74 [uvcvideo])
r8:c721c050 r7:c7265e68 r6:c721c094 r5:00000000 r4:c721c050
[<bf014c0c>] (uvc_video_enable+0x0/0x74 [uvcvideo]) from [<bf014308>]
(uvc_v4l2_do_ioctl+0xce4/0xf50 [uvcvideo])
r7:c7265e68 r6:c79f9e00 r5:c78d4760 r4:40045613
[<bf013624>] (uvc_v4l2_do_ioctl+0x0/0xf50 [uvcvideo]) from
[<bf008e20>] (video_usercopy+0x1b8/0x2b8 [videodev])
[<bf008c68>] (video_usercopy+0x0/0x2b8 [videodev]) from [<bf012fdc>]
(uvc_v4l2_ioctl+0x54/0x68 [uvcvideo])
[<bf012f88>] (uvc_v4l2_ioctl+0x0/0x68 [uvcvideo]) from [<c00ace28>]
(vfs_ioctl+0x68/0x78)
r7:c79eb400 r6:00000003 r5:40c78ccc r4:40045613
[<c00acdc0>] (vfs_ioctl+0x0/0x78) from [<c00ad0a8>] (do_vfs_ioctl +0x270/0x280)
r5:40c78ccc r4:c79eb400
[<c00ace38>] (do_vfs_ioctl+0x0/0x280) from [<c00ad0f8>] (sys_ioctl +0x40/0x64)
r7:c79eb400 r6:40045613 r5:40c78ccc r4:00000003
[<c00ad0b8>] (sys_ioctl+0x0/0x64) from [<c0033c80>] (ret_fast_syscall +0x0/0x2c)

- Nathan
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