diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 16536c41f0c5..28ffcd5fcca2 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -2166,7 +2166,6 @@ enum MR_PD_TYPE {
 
 struct megasas_instance {
 
-	unsigned int *reply_map;
 	__le32 *producer;
 	dma_addr_t producer_h;
 	__le32 *consumer;
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index f7bdd783360a..d2612e6358ec 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5299,26 +5299,6 @@ megasas_setup_jbod_map(struct megasas_instance *instance)
 		instance->use_seqnum_jbod_fp = false;
 }
 
-static void megasas_setup_reply_map(struct megasas_instance *instance)
-{
-	const struct cpumask *mask;
-	unsigned int queue, cpu;
-
-	for (queue = 0; queue < instance->msix_vectors; queue++) {
-		mask = pci_irq_get_affinity(instance->pdev, queue);
-		if (!mask)
-			goto fallback;
-
-		for_each_cpu(cpu, mask)
-			instance->reply_map[cpu] = queue;
-	}
-	return;
-
-fallback:
-	for_each_possible_cpu(cpu)
-		instance->reply_map[cpu] = cpu % instance->msix_vectors;
-}
-
 /**
  * megasas_init_fw -	Initializes the FW
  * @instance:		Adapter soft state
@@ -5524,8 +5504,6 @@ static int megasas_init_fw(struct megasas_instance *instance)
 			goto fail_init_adapter;
 	}
 
-	megasas_setup_reply_map(instance);
-
 	dev_info(&instance->pdev->dev,
 		"firmware supports msix\t: (%d)", fw_msix_count);
 	dev_info(&instance->pdev->dev,
@@ -6164,6 +6142,8 @@ static int megasas_io_attach(struct megasas_instance *instance)
 	host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
 	host->max_lun = MEGASAS_MAX_LUN;
 	host->max_cmd_len = 16;
+	if (instance->adapter_type != MFI_SERIES && instance->msix_vectors > 0)
+		host->nr_hw_queues = instance->msix_vectors;
 
 	/*
 	 * Notify the mid-layer about the new controller
@@ -6331,11 +6311,6 @@ static inline int megasas_alloc_mfi_ctrl_mem(struct megasas_instance *instance)
  */
 static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
 {
-	instance->reply_map = kcalloc(nr_cpu_ids, sizeof(unsigned int),
-				      GFP_KERNEL);
-	if (!instance->reply_map)
-		return -ENOMEM;
-
 	switch (instance->adapter_type) {
 	case MFI_SERIES:
 		if (megasas_alloc_mfi_ctrl_mem(instance))
@@ -6352,8 +6327,6 @@ static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
 
 	return 0;
  fail:
-	kfree(instance->reply_map);
-	instance->reply_map = NULL;
 	return -ENOMEM;
 }
 
@@ -6366,7 +6339,6 @@ static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
  */
 static inline void megasas_free_ctrl_mem(struct megasas_instance *instance)
 {
-	kfree(instance->reply_map);
 	if (instance->adapter_type == MFI_SERIES) {
 		if (instance->producer)
 			dma_free_coherent(&instance->pdev->dev, sizeof(u32),
@@ -6988,8 +6960,6 @@ megasas_resume(struct pci_dev *pdev)
 	if (rval < 0)
 		goto fail_reenable_msix;
 
-	megasas_setup_reply_map(instance);
-
 	if (instance->adapter_type != MFI_SERIES) {
 		megasas_reset_reply_desc(instance);
 		if (megasas_ioc_init_fusion(instance)) {
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 211c17c33aa0..dd89fa4dd328 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -2629,6 +2629,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
 	struct MR_PRIV_DEVICE *mrdev_priv;
 	struct RAID_CONTEXT *rctx;
 	struct RAID_CONTEXT_G35 *rctx_g35;
+	u32 tag = blk_mq_unique_tag(scp->request);
 
 	device_id = MEGASAS_DEV_INDEX(scp);
 
@@ -2724,8 +2725,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
 			fp_possible = (io_info.fpOkForIo > 0) ? true : false;
 	}
 
-	cmd->request_desc->SCSIIO.MSIxIndex =
-		instance->reply_map[raw_smp_processor_id()];
+	cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag);
 
 	if (instance->adapter_type >= VENTURA_SERIES) {
 		/* FP for Optimal raid level 1.
@@ -2971,6 +2971,7 @@ megasas_build_syspd_fusion(struct megasas_instance *instance,
 	u16 pd_index = 0;
 	u16 os_timeout_value;
 	u16 timeout_limit;
+	u32 tag = blk_mq_unique_tag(scmd->request);
 	struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
 	struct RAID_CONTEXT	*pRAID_Context;
 	struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
@@ -3038,8 +3039,7 @@ megasas_build_syspd_fusion(struct megasas_instance *instance,
 
 	cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
 
-	cmd->request_desc->SCSIIO.MSIxIndex =
-		instance->reply_map[raw_smp_processor_id()];
+	cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag);
 
 	if (!fp_possible) {
 		/* system pd firmware path */
