Re: [Alsa-user] ALSA -18 infinite loop

[Amit N. <hel...@gm...>]

Hi ,

Just sharing the dump stack at the time of ALSA -18 continous error
logs coming from retire_capture_urb() function :


[<bf3a7860>] (retire_capture_urb+0x0/0x1ec [snd_usb_audio]) from
[<bf3a77d4>] (snd_complete_urb+0x3c/0xc8 [snd_usb_audio])

[<bf3a7798>] (snd_complete_urb+0x0/0xc8 [snd_usb_audio]) from
[<bf0fd460>] (usb_hcd_giveback_urb+0x78/0x1d4 [usbcore])
 r8:ffc63480 r7:c37a3f00 r6:00000000 r5:00000000 r4:c1047ac0
r3:bf3a7798

[<bf0fd3e8>] (usb_hcd_giveback_urb+0x0/0x1d4 [usbcore]) from
[<bf11a40c>] (ehci_shutdown+0x2f4/0xacc [ehci_hcd])
 r5:c100b400 r4:c1047ac0

[<bf11a360>] (ehci_shutdown+0x248/0xacc [ehci_hcd]) from [<bf11c128>]
(ehci_urb_dequeue+0xf0c/0x12b4 [ehci_hcd])
 r6:c100b400 r5:ffc63460 r4:c100b4d0 r3:00000001

[<bf11bcac>] (ehci_urb_dequeue+0xa90/0x12b4 [ehci_hcd]) from
[<bf11d15c>] (ehci_irq+0x1bc/0x204 [ehci_hcd])

[<bf11cfa0>] (ehci_irq+0x0/0x204 [ehci_hcd]) from [<bf0fd0e8>]
(usb_hcd_irq+0x40/0x98 [usbcore])

[<bf0fd0a8>] (usb_hcd_irq+0x0/0x98 [usbcore]) from [<c0094898>]
(handle_IRQ_event+0xa8/0x1d0)
 r5:c7b76000 r4:c7b2af60

[<c00947f0>] (handle_IRQ_event+0x0/0x1d0) from [<c00967dc>]
(handle_level_irq+0xc8/0x148)

[<c0096714>] (handle_level_irq+0x0/0x148) from [<c002804c>]
(asm_do_IRQ+0x4c/0x64)
 r6:00000038 r5:00000000 r4:0000000e r3:c0096714

[<c0028000>] (asm_do_IRQ+0x0/0x64) from [<c02fdf04>] (__irq_usr+0x44/0xa0)


Regards
Amit Nagal



On Thu, Oct 21, 2010 at 5:26 PM, Amit Nagal <hel...@gm...> wrote:
> Hi,
>
> Thanx for ur suggestions and time .
>
> As suggested by you ( debugged the  code that didn't shut down the USB
> streaming properly ) ,
>
> i am finding that at USB disconnect ,
>
> even the functions usb_audio_disconnect() &&
> snd_usb_audio_disconnect() are not at all getting called .
>
> i need to check the shut down process of USB streaming  to find out
> the  reason .
>
> if some more pointers to code areas can be shared  , it will be nice  .
>
> Thanx & Regards
> Amit Nagal
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Thu, Oct 21, 2010 at 12:59 PM, Clemens Ladisch <cl...@la...> wrote:
>> I wrote:
>>> Amit Nagal wrote:
>>> > Actually since i am using a embedded target , it is not possible to
>>> > use higher kernel version .
>>>
>>> But you could at least test a newer kernel on another machine.
>>
>> Unplugging works for me on current kernels, so it looks as if the
>> problem has been fixed.
>>
>>> > any clues / pointer to functions .changes which can resolve this
>>> > problem in existing linux kernel ?
>>
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=history;f=sound/usb;hb=HEAD
>>
>>
>> Regards,
>> Clemens
>>
>