[PATCH] md: ignore auto-readonly flag for arrays where it isn't meaningful

The 'auto-readonly' flag (which suppresses resync and superblock updates until
the first write) is not meaningful for personalities that don't support resync
or superblock writes (raid0, linear, etc).

So clear the setting early to avoid it confusing anything - e.g.  appearing in
/proc/mdstat

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 47b8685d4bdf..25f2bbfe6a2b 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2058,6 +2058,9 @@ static int do_md_run(mddev_t * mddev)
         }
         if (mddev->pers->sync_request)
                 sysfs_create_group(&mddev->kobj, &md_redundancy_group);
+        else if (mddev->ro == 2) /* auto-readonly not meaningful */
+                mddev->ro = 0;
+
         atomic_set(&mddev->writes_pending,0);
         mddev->safemode = 0;
         mddev->safemode_timer.function = md_safemode_timeout;