tag e7c027d76ddeb62378eab3b3e4651b69dd8de093
tagger Martin K. Petersen <martin.petersen@oracle.com> Mon Feb 14 22:13:58 2022 -0500
object 10af115646171afc0217177d6eae92917b785897

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

commit 10af115646171afc0217177d6eae92917b785897
author Jinyoung Choi <j-young.choi@samsung.com> Mon Feb 14 19:33:52 2022 +0900
committer Martin K. Petersen <martin.petersen@oracle.com> Mon Feb 14 22:10:29 2022 -0500
tree c6e3f384f2310377748ff617eb534fb42f3a73d3
parent 7f4c5a26f735dea4bbc0eb8eb9da99cda95a8563

scsi: ufs: core: Fix divide by zero in ufshcd_map_queues()

Before calling blk_mq_map_queues(), the mq_map and nr_queues belonging to
struct blk_mq_queue_map must have a valid value.

If nr_queues is set to 0, the system may encounter a divide by zero
depending on the type of architecture.

    blk_mq_map_queues() -> queue_index()

Link: https://lore.kernel.org/r/1891546521.01644873481638.JavaMail.epsvc@epcpadp4
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jinyoung Choi <j-young.choi@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>