On Wed, Jun 05, 2013 at 11:07:46AM -0700, Oleg Rombakh wrote: > Sarah, > > I found an issue where a USB camera connected to USB3 port might stop capturing frames. > Steps to reproduce: > > 1. Attach a USB camera to USB3 port (any camera will do but in my case used Logitech camers) > > 2. Run the following script > > while true; do > > gst-launch-0.10 v4l2src ! xvimagesink & > > sleep 2 > > pkill gst-l > > done > > > 3. After some time camera will no longer work > > The issue was traced to xhci driver, where replacing wait_for_completion_interruptible_timeout() to wait_for_completion_timeout() will fix the above use case. > > Please see attached patch. > > Please let me know if this is an acceptable solution to the problem. This is a known issue. Your patch is just a work-around though, and we should fix the underlying issue, rather than papering over it by changing it to an uninterruptible sleep. The chromium team ran into a similar issue, and we're having a conversation about the right way to fix it: http://marc.info/?l=linux-kernel&m=136944610123147&w=2 We'll try to Cc you on that conversation as it moves forward. Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
