Commit f3b99be1 authored Jun 24, 2010 by NeilBrown

Restore partition detection of newly created md arrays.



Commit  b821eaa5 broke partition
detection for md arrays.

The logic was almost right.  However if revalidate_disk is called
when the device is not yet open, bdev->bd_disk won't be set, so the
flush_disk() Call will not set bd_invalidated.

So when md_open is called we still need to ensure that
->bd_invalidated gets set.  This is easily done with a call to
check_disk_size_change in the place where the offending commit removed
check_disk_change.  At the important times, the size will have changed
from 0 to non-zero, so check_disk_size_change will set bd_invalidated.

Tested-by: Duncan <1i5t5.duncan@cox.net>
Reported-by: Duncan <1i5t5.duncan@cox.net>
Signed-off-by: NeilBrown <neilb@suse.de>

parent 7e27d6e7

drivers/md/md.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -5895,6 +5895,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
		atomic_inc(&mddev->openers);
		mutex_unlock(&mddev->open_mutex);

		check_disk_size_change(mddev->gendisk, bdev);
		out:
		return err;
		}