Re: Kernel oops on usbhid_submit_report (updates)

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Amit <amit.uttam@...> writes:

> I am getting the following kernel oops (http://paste.debian.net/182812/)
> sporadically. Kernel version is 3.2.14.
> 
> Code basically does the following:
> 
>  ioctl(fd,HIDIOCSUSAGES, &ref_multi_u);
>  ioctl(fd,HIDIOCSREPORT, &rep_info_u);
> 
> Here are some notes:
> 
>  1. Happens in implement() function called by hid_output_report.
>  2. Did an ftrace and found the HIDIOCSREPORT call takes 5.3ms to
>  complete. Is it suppose to take this long?
>  3. Very hard to reproduce. Seems to me like a race condition?

Some updates:

After running usbmon, I realized that the paging request address is the
address of the urb. I think the urb gets deleted while the implement
function is going on.

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