From: Daniel Wagner dwagner@suse.de
[ Upstream commit d1bcf006a9d3d63c1bcb65a993cb13756954cd9c ]
nvme_round_robin_path() should test if the return ns pointer is valid. nvme_next_ns() will return a NULL pointer if there is no path left.
Fixes: 75c10e732724 ("nvme-multipath: round-robin I/O policy") Signed-off-by: Daniel Wagner dwagner@suse.de Reviewed-by: Hannes Reinecke hare@suse.de Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/multipath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 74896be40c176..292e535a385d4 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -221,7 +221,7 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head, }
for (ns = nvme_next_ns(head, old); - ns != old; + ns && ns != old; ns = nvme_next_ns(head, ns)) { if (nvme_path_is_disabled(ns)) continue;