rt2x00: Don't kill guardian_urb when it wasn't created
authorIvo van Doorn <IvDoorn@gmail.com>
Tue, 3 Jun 2008 18:29:50 +0000 (20:29 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Fri, 13 Jun 2008 20:14:46 +0000 (16:14 -0400)
This fixes a "BUG: unable to handle kernel paging request"
bug in rt73usb which was caused by killing the guardian_urb
while it had never been allocated for rt73usb.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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