On Sun, 21 Mar 2010 22:31:06 +0100 (CET) Julia Lawall <ju...@diku.dk> wrote:
> From: Julia Lawall <ju...@diku.dk>
>
> If ov is NULL, it will not be possible to take the lock in the first place,
> so move the test up earlier.
>
> ...
>
> --- a/drivers/media/video/ov511.c
> +++ b/drivers/media/video/ov511.c
> @@ -5913,14 +5913,12 @@ ov51x_disconnect(struct usb_interface *intf)
>
> PDEBUG(3, "");
>
> + if (!ov)
> + return;
> +
> mutex_lock(&ov->lock);
> usb_set_intfdata (intf, NULL);
>
> - if (!ov) {
> - mutex_unlock(&ov->lock);
> - return;
> - }
> -
> /* Free device number */
> ov511_devused &= ~(1 << ov->nr);
I think we can pretty safely assume that we never get here with ov==NULL.
Oh well, I'll leave the test there for others to ponder.
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