From: Jens Axboe <axboe@suse.de>

I need this patch to survive suspend on my powerbook, if the drive is
sleeping when suspend is entered.  Otherwise it freezes on resume when it
tries to read from the drive.

Acked by Ben.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>