Re: block completion races

From: Manfred Spraul (manfred@colorfullife.com)
Date: Wed Jan 16 2002 - 11:55:08 EST


> Also, there is this code in ide_do_drive_cmd():
>
> if (action == ide_wait) {
> wait_for_completion(&wait); /* wait for it to be serviced */
> return rq->errors ? -EIO : 0; /* return -EIO if errors */
> }
>
> Is it safe to use `rq' here? It has just been recycled in
> end_that_request_last() and we don't own it any more.
>

Yes, this is safe. rq lies on the stack of the caller of
ide_do_drive_cmd() - it can't disappear before we return.

--
	Manfred
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Wed Jan 23 2002 - 21:00:16 EST