[dm-devel] [PATCH V3 11/11] multipathd: don't assume mpp->paths will exist in need_switch_pathgroup

[Benjamin Marzinski]

When need_switch_pathgroup() is called by deferred_failback_tick(),
there is a chance that mpp->paths will be NULL, even if there are paths
in the multipath device's pathgroups. Instead check if there are
multiple pathgroups, since multipath can't be using the wrong pathgroup
if there is one or none.

Reviewed-by: Martin Wilck <mwilck at suse.com>
Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
 multipathd/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/multipathd/main.c b/multipathd/main.c
index 584be895..6463d2b7 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -439,7 +439,7 @@ need_switch_pathgroup (struct multipath * mpp, bool *need_reload)
 	if (!mpp)
 		return 0;
 
-	if (!mpp->pg || VECTOR_SIZE(mpp->paths) == 0)
+	if (VECTOR_SIZE(mpp->pg) < 2)
 		return 0;
 
 	bestpg = select_path_group(mpp);
-- 
2.17.2