USB: uss720 fixup refcount position
commit658e9624a3302c6885df35ea7177df18049c7657
authorPeter Holik <peter@holik.at>
Fri, 18 Mar 2011 17:47:44 +0000 (18 18:47 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Sun, 27 Mar 2011 18:30:46 +0000 (27 11:30 -0700)
tree1fdee0ba45ee04ab2f9bfbb75794f3c0967b268f
parent067132298eb8ce07602a847fbbc343a009093e42
USB: uss720 fixup refcount position

commit adaa3c6342b249548ea830fe8e02aa5b45be8688 upstream.

My testprog do a lot of bitbang - after hours i got following warning and my machine lockups:
WARNING: at /build/buildd/linux-2.6.38/lib/kref.c:34
After debugging uss720 driver i discovered that the completion callback was called before
usb_submit_urb returns. The callback frees the request structure that is krefed on return by
usb_submit_urb.

Signed-off-by: Peter Holik <peter@holik.at>
Acked-by: Thomas Sailer <t.sailer@alumni.ethz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/misc/uss720.c