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

This reverts commit 9dc704dcc09eae7d21b5da0615eb2ed79278f63e.

Several reports have been made indicating that this commit caused
hangs. Numerous attempts at root causing and fixing the issue have
been unsuccessful so let's revert for now.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217599
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

4 files changed, 3 insertions, 43 deletions

diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index 73b6ac0c01f5..7d5a155073c6 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -1678,7 +1678,6 @@ struct aac_dev
 	u32			handle_pci_error;
 	bool			init_reset;
 	u8			soft_reset_support;
-	u8			use_map_queue;
 };
 
 #define aac_adapter_interrupt(dev) \
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 013a9a334972..25cee03d7f97 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -223,12 +223,8 @@ int aac_fib_setup(struct aac_dev * dev)
 struct fib *aac_fib_alloc_tag(struct aac_dev *dev, struct scsi_cmnd *scmd)
 {
 	struct fib *fibptr;
-	u32 blk_tag;
-	int i;
 
-	blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
-	i = blk_mq_unique_tag_to_tag(blk_tag);
-	fibptr = &dev->fibs[i];
+	fibptr = &dev->fibs[scsi_cmd_to_rq(scmd)->tag];
 	/*
 	 *	Null out fields that depend on being zero at the start of
 	 *	each I/O
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index c4a36c0be527..68f4dbcfff49 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -19,7 +19,6 @@
 
 #include <linux/compat.h>
 #include <linux/blkdev.h>
-#include <linux/blk-mq-pci.h>
 #include <linux/completion.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -505,15 +504,6 @@ common_config:
 	return 0;
 }
 
-static void aac_map_queues(struct Scsi_Host *shost)
-{
-	struct aac_dev *aac = (struct aac_dev *)shost->hostdata;
-
-	blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
-			      aac->pdev, 0);
-	aac->use_map_queue = true;
-}
-
 /**
  *	aac_change_queue_depth		-	alter queue depths
  *	@sdev:	SCSI device we are considering
@@ -1498,7 +1488,6 @@ static const struct scsi_host_template aac_driver_template = {
 	.bios_param			= aac_biosparm,
 	.shost_groups			= aac_host_groups,
 	.slave_configure		= aac_slave_configure,
-	.map_queues			= aac_map_queues,
 	.change_queue_depth		= aac_change_queue_depth,
 	.sdev_groups			= aac_dev_groups,
 	.eh_abort_handler		= aac_eh_abort,
@@ -1786,8 +1775,6 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	shost->max_lun = AAC_MAX_LUN;
 
 	pci_set_drvdata(pdev, shost);
-	shost->nr_hw_queues = aac->max_msix;
-	shost->host_tagset = 1;
 
 	error = scsi_add_host(shost, &pdev->dev);
 	if (error)
@@ -1919,7 +1906,6 @@ static void aac_remove_one(struct pci_dev *pdev)
 	struct aac_dev *aac = (struct aac_dev *)shost->hostdata;
 
 	aac_cancel_rescan_worker(aac);
-	aac->use_map_queue = false;
 	scsi_remove_host(shost);
 
 	__aac_shutdown(aac);
diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c
index 61949f374188..11ef58204e96 100644
--- a/drivers/scsi/aacraid/src.c
+++ b/drivers/scsi/aacraid/src.c
@@ -493,10 +493,6 @@ 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);
 
@@ -509,25 +505,8 @@ 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 {
-			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);
-			}
-		}
+		else
+			vector_no = fib->vector_no;
 
 		if (native_hba) {
 			if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {