scsi: ufs: mcq: Use pointer arithmetic in ufshcd_send_command()

Make sqe_base_addr the UTRD pointer it is, instead of an opaque void *.

Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20230329101303.18377-3-avri.altman@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: avri-altman-sndk

drivers/ufs/core/ufshcd.c

@@ -2242,10 +2242,11 @@ void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag,
 
 	if (is_mcq_enabled(hba)) {
 		int utrd_size = sizeof(struct utp_transfer_req_desc);
+		struct utp_transfer_req_desc *src = lrbp->utr_descriptor_ptr;
+		struct utp_transfer_req_desc *dest = hwq->sqe_base_addr + hwq->sq_tail_slot;
 
 		spin_lock(&hwq->sq_lock);
-		memcpy(hwq->sqe_base_addr + (hwq->sq_tail_slot * utrd_size),
-		       lrbp->utr_descriptor_ptr, utrd_size);
+		memcpy(dest, src, utrd_size);
 		ufshcd_inc_sq_tail(hwq);
 		spin_unlock(&hwq->sq_lock);
 	} else {

include/ufs/ufshcd.h

@@ -1095,7 +1095,7 @@ struct ufs_hw_queue {
 	void __iomem *mcq_cq_head;
 	void __iomem *mcq_cq_tail;
 
-	void *sqe_base_addr;
+	struct utp_transfer_req_desc *sqe_base_addr;
 	dma_addr_t sqe_dma_addr;
 	struct cq_entry *cqe_base_addr;
 	dma_addr_t cqe_dma_addr;