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| author |   Ming Lei <ming.lei@redhat.com> | 2022-07-06 20:59:42 +0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2022-07-13 22:57:03 -0400 |
| commit | 8312cd3a7b835ae3033a679e5f0014a40e7891c5 (patch) | |
| tree | 33b137e1411969484bc59dd5c460615d97be49a5 /drivers/scsi/megaraid/megaraid_sas_base.c | |
| parent | scsi: target: Fix WRITE_SAME No Data Buffer crash (diff) | |
| download | linux-dev-8312cd3a7b835ae3033a679e5f0014a40e7891c5.tar.xz linux-dev-8312cd3a7b835ae3033a679e5f0014a40e7891c5.zip | |
scsi: megaraid: Clear READ queue map's nr_queues
The megaraid SCSI driver sets set->nr_maps as 3 if poll_queues is > 0, and
blk-mq actually initializes each map's nr_queues as nr_hw_queues.
Consequently the driver has to clear READ queue map's nr_queues, otherwise
the queue map becomes broken if poll_queues is set as non-zero.
Link: https://lore.kernel.org/r/20220706125942.528533-1-ming.lei@redhat.com
Fixes: 9e4bec5b2a23 ("scsi: megaraid_sas: mq_poll support")
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: sumit.saxena@broadcom.com
Cc: chandrakanth.patil@broadcom.com
Cc: linux-block@vger.kernel.org
Cc: Hannes Reinecke <hare@suse.de>
Reported-by: Guangwu Zhang <guazhang@redhat.com>
Tested-by: Guangwu Zhang <guazhang@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index c95360a3c186..0917b05059b4 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3195,6 +3195,9 @@ static int megasas_map_queues(struct Scsi_Host *shost) qoff += map->nr_queues; offset += map->nr_queues; + /* we never use READ queue, so can't cheat blk-mq */ + shost->tag_set.map[HCTX_TYPE_READ].nr_queues = 0; + /* Setup Poll hctx */ map = &shost->tag_set.map[HCTX_TYPE_POLL]; map->nr_queues = instance->iopoll_q_count; |