On Mon, 2 Nov 2015 10:27:00 +0100
Jiri Slaby <jslaby@xxxxxxx> wrote:
> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
> --- a/drivers/usb/class/usblp.c
> +++ b/drivers/usb/class/usblp.c
> @@ -884,11 +884,11 @@ static int usblp_wwait(struct usblp *usblp, int nonblock)
>
> add_wait_queue(&usblp->wwait, &waita);
> for (;;) {
> - set_current_state(TASK_INTERRUPTIBLE);
> if (mutex_lock_interruptible(&usblp->mut)) {
> rc = -EINTR;
> break;
> }
> + set_current_state(TASK_INTERRUPTIBLE);
> rc = usblp_wtest(usblp, nonblock);
> mutex_unlock(&usblp->mut);
> if (rc <= 0)
I'm fully onboard with this. In the original "big cleanup" 317c67b8f,
I got this right. But then I either missed that mutex_lock_interruptible()
can set the state, or it didn't do it back then (it was in 2007), and
the 7f477358e introduced the existing code.
Acked-By: Pete Zaitcev <zaitcev@xxxxxxxxx>
-- Pete
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