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SubjectRe: [PATCH v2] nvme-multipath: Early exit if no path is available
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On 1/27/21 11:30 AM, Daniel Wagner wrote:
> 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")
> Cc: Hannes Reinecke <hare@suse.de>
> Signed-off-by: Daniel Wagner <dwagner@suse.de>
> ---
> v2:
> - moved NULL test into the if conditional statement
> - added Fixes tag
>
> 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 9ac762b28811..282b7a4ea9a9 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;
>
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer

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