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scsi: aacraid: Reply queue mapping to CPUs based on IRQ affinity

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Fix the I/O hang that arises because of the MSIx vector not having a mapped
online CPU upon receiving completion.

SCSI cmds take the blk_mq route, which is setup during init. Reserved cmds
fetch the vector_no from mq_map after init is complete. Before init, they
have to use 0 - as per the norm.

Reviewed-by: Gilbert Wu <gilbert.wu@microchip.com>
Signed-off-by: Sagar Biradar <Sagar.Biradar@microchip.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230519230834.27436-1-sagar.biradar@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sagar Biradar
2023-05-19 16:08:34 -07:00
committed by Martin K. Petersen
parent 6d074ce231
commit 9dc704dcc0
4 changed files with 43 additions and 3 deletions
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drivers/scsi/aacraid/src.c
+23 -2
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@@ -493,6 +493,10 @@ static int aac_src_deliver_message(struct fib *fib)
#endif
u16 vector_no;
struct scsi_cmnd *scmd;
u32 blk_tag;
struct Scsi_Host *shost = dev->scsi_host_ptr;
struct blk_mq_queue_map *qmap;
atomic_inc(&q->numpending);
@@ -505,8 +509,25 @@ static int aac_src_deliver_message(struct fib *fib)
if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)
&& dev->sa_firmware)
vector_no = aac_get_vector(dev);
else
vector_no = fib->vector_no;
else {
if (!fib->vector_no || !fib->callback_data) {
if (shost && dev->use_map_queue) {
qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
vector_no = qmap->mq_map[raw_smp_processor_id()];
}
/*
* We hardcode the vector_no for
* reserved commands as a valid shost is
* absent during the init
*/
else
vector_no = 0;
} else {
scmd = (struct scsi_cmnd *)fib->callback_data;
blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
vector_no = blk_mq_unique_tag_to_hwq(blk_tag);
}
}
if (native_hba) {
if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {