[PATCH] adjust SG reserved size automatically

The block layer SG should have the identical behaviour as SCSI sg when
it comes to SG_SET_RESERVED_SIZE - allow caller to specify a large
amount, truncate to largest we support, and return that with
SG_GET_RESERVED_SIZE.  Currently we fail with -EINVAL if the value is
too large, I think the SCSI sg behaviour is more sane to use.  This
one-liner fixes it up, please apply for 2.6.8.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/block/scsi_ioctl.c

@@ -90,7 +90,7 @@ static int sg_set_reserved_size(request_queue_t *q, int __user *p)
 	if (size < 0)
 		return -EINVAL;
 	if (size > (q->max_sectors << 9))
-		return -EINVAL;
+		size = q->max_sectors << 9;
 
 	q->sg_reserved_size = size;
 	return 0;