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authorBart Van Assche <bart.vanassche@sandisk.com>2017-04-27 10:11:22 -0700
committerMike Snitzer <snitzer@redhat.com>2017-04-27 17:08:43 -0400
commitb194679fac3067e785f432109c69759aa75b038c (patch)
treef650ebbced17f5f826238822d732d9eb99d04f7f /drivers/md
parent1ea0654e46eb62acc379000be2f16350101ebf85 (diff)
dm mpath: verify __pg_init_all_paths locking assumptions at runtime
Verify at runtime that __pg_init_all_paths() is called with multipath.lock held if lockdep is enabled. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-mpath.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index d85baffa3377..730ec0be1afa 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -298,6 +298,8 @@ static int __pg_init_all_paths(struct multipath *m)
struct pgpath *pgpath;
unsigned long pg_init_delay = 0;
+ lockdep_assert_held(&m->lock);
+
if (atomic_read(&m->pg_init_in_progress) || test_bit(MPATHF_PG_INIT_DISABLED, &m->flags))
return 0;