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USB: ipaq.c: fix a timeout loop 

commit abdc9a3b4bac97add99e1d77dc6d28623afe682b upstream.

The code expects the loop to end with "retries" set to zero but, because
it is a post-op, it will end set to -1.  I have fixed this by moving the
decrement inside the loop.

Fixes: 014aa2a3c3 ('USB: ipaq: minor ipaq_open() cleanup.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2015-12-16 14:06:37 +03:00 committed by Greg Kroah-Hartman
parent e6a13dd47b
commit 5dbf71c9f6
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/serial/ipaq.c
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@ -532,7 +532,8 @@ static int ipaq_open(struct tty_struct *tty,
* through. Since this has a reasonably high failure rate, we retry
* several times.
*/
while (retries--) {
while (retries) {
retries--;
result = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0), 0x22, 0x21,
0x1, 0, NULL, 0, 100);