tree ade4c7d97b3569aa04ec5f48eaa4a22a99583291
parent 3edce1cf813aa6a087df7730cec0e67d57288300
author Du Xing <duxing2007@gmail.com> 1363783666 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1364243540 -0700

USB: usb-skeleton.c: fix blocked forever in skel_read

In skel_read,the reader blocked in wait_for_completion before submit
bulk in urb.
Using processed_urb is for retaining the completion in the case that
previous interruptible wait in skel_read was interrupted and complete
before next skel_read.  Replacing completion with waitqueue can avoid
working around the counting nature of completions
and fix the bug.

Signed-off-by: Du Xing duxing2007@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>