[ 11/82] md: raid0: fix error return from create_stripe_zones.

Ben Hutchings
2013-03-18T04:31:00Z

From: NeilBrown <neilb@suse.de>

commit 58ebb34c49fcfcaa029e4b1c1453d92583900f9a upstream.

Create_stripe_zones returns an error slightly differently to
raid0_run and to raid0_takeover_*.

The error returned used by the second was wrong and an error would
result in mddev->private being set to NULL and sooner or later a
crash.

So never return NULL, return ERR_PTR(err), not NULL from
create_stripe_zones.

This bug has been present since 2.6.35 so the fix is suitable
for any kernel since then.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/md/raid0.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -286,7 +286,7 @@ abort:
kfree(conf->strip_zone);
kfree(conf->devlist);
kfree(conf);
- *private_conf = NULL;
+ *private_conf = ERR_PTR(err);
return err;
}