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nvme-multipath: Early exit if no path is available 

[ 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: 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Wagner 2021-01-27 11:30:33 +01:00 committed by Greg Kroah-Hartman
parent 64a4ec1850
commit e4405451dd
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/multipath.c
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@ -233,7 +233,7 @@ 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;