Re: [linux-pm] [PATCH] Block on access to temporarily unavailable pci device

Alan Stern
2006-10-18T15:53:01Z

On Wed, 18 Oct 2006, Matthew Wilcox wrote:

> On Wed, Oct 18, 2006 at 10:38:20AM -0400, Alan Stern wrote:
> > You have to do _something_, because a user task could be about to read the
> > configuration space at the exact moment you want to start the BIST. That
> > means ipr would have to wait until the user access is finished, which
> > means it has to be prepared to sleep one way or another.
>
> Actually, it only has to spin until the user has finished accessing
> config space. See the patch I just posted.

I stand corrected.

Don't you want the user process to wait in TASK_INTERRUPTIBLE? It would
require only a very simple change.

Alan Stern