From: NeilBrown <neilb@suse.de>
Date: Mon, 13 Oct 2008 00:55:12 +0000 (+1100)
Subject: md: Don't try to set an array to 'read-auto' if it is already in that state.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=80268ee9270ebe4847365a7426de91d179e870d0;p=linux-beck.git

md: Don't try to set an array to 'read-auto' if it is already in that state.

'read-auto' is a variant of 'readonly' which will switch to writable
on the first write attempt.

Calling do_md_stop to set the array readonly when it is already readonly
returns an error.  So make sure not to do that.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 13dd7b276150..fc33082d5ffd 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2725,9 +2725,9 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
 		break;
 	case read_auto:
 		if (mddev->pers) {
-			if (mddev->ro != 1)
+			if (mddev->ro == 0)
 				err = do_md_stop(mddev, 1, 0);
-			else
+			else if (mddev->ro == 1)
 				err = restart_array(mddev);
 			if (err == 0) {
 				mddev->ro = 2;