Re: block completion races

[Jens Axboe]

On Wed, Jan 16 2002, Manfred Spraul wrote:
> > 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.

Duh yes of course, I was even preaching this on irc the other day :/

-- 
Jens Axboe