On Tue, 24 May 2011, Soho Soho123 wrote:
> Dears,
>
> in linux 2.6.34, we test uvc driver with MJPG-Streamer server via WiFi
> network. After about half hour, web cam will hang,
> because we can see the error from console:
> "uvcvideo: Failed to resubmit video URB (-27)."
> after checking code in detail, we find the error is reported from
> ehci-sched.c iso_stream_schedule(), the check:
> if (unlikely(((start - now) & (mod - 1)) + sched->span>= mod - 2 *
> SCHEDULE_SLOP)) {
> status = -EFBIG;
> goto fail;
> }
> do you have any idea?
> this is generic IPCam testing.
2.6.34 is an old kernel. Please try testing with 2.6.39. There have
been several changes to iso_stream_schedule().
Alan Stern
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