nvme-multipath: Early exit if no path is available

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: 75c10e7327 ("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>
This commit is contained in:
Daniel Wagner 2021-01-27 11:30:33 +01:00 committed by Christoph Hellwig
parent 899199292b
commit d1bcf006a9

View File

@ -221,7 +221,7 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
} }
for (ns = nvme_next_ns(head, old); for (ns = nvme_next_ns(head, old);
ns != old; ns && ns != old;
ns = nvme_next_ns(head, ns)) { ns = nvme_next_ns(head, ns)) {
if (nvme_path_is_disabled(ns)) if (nvme_path_is_disabled(ns))
continue; continue;