[patch 41/56] md: Dont try to set an array to read-auto if it isalready in that state.

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.
------------------

From: NeilBrown <neilb@xxxxxxx>

commit 80268ee9270ebe4847365a7426de91d179e870d0 upstream.

'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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/md/md.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2742,9 +2742,9 @@ array_state_store(mddev_t *mddev, const 
 		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;

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