[PATCH 6.8 238/493] scsi: ufs: core: mcq: Fix ufshcd_mcq_sqe_search()

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6.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bart Van Assche <bvanassche@xxxxxxx>

[ Upstream commit 3c5d0dce8ce0a2781ac306b9ad1492b005ecbab5 ]

Fix the calculation of the utrd pointer. This patch addresses the following
Coverity complaint:

CID 1538170: (#1 of 1): Extra sizeof expression (SIZEOF_MISMATCH)
suspicious_pointer_arithmetic: Adding sq_head_slot * 32UL /* sizeof (struct
utp_transfer_req_desc) */ to pointer hwq->sqe_base_addr of type struct
utp_transfer_req_desc * is suspicious because adding an integral value to
this pointer automatically scales that value by the size, 32 bytes, of the
pointed-to type, struct utp_transfer_req_desc. Most likely, the
multiplication by sizeof (struct utp_transfer_req_desc) in this expression
is extraneous and should be eliminated.

Cc: Bao D. Nguyen <quic_nguyenb@xxxxxxxxxxx>
Cc: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Cc: Can Guo <quic_cang@xxxxxxxxxxx>
Fixes: 8d7290348992 ("scsi: ufs: mcq: Add supporting functions for MCQ abort")
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Link: https://lore.kernel.org/r/20240410000751.1047758-1-bvanassche@xxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/ufs/core/ufs-mcq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index c873fd8239427..7ae3096814282 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -597,8 +597,7 @@ static bool ufshcd_mcq_sqe_search(struct ufs_hba *hba,
 	addr = le64_to_cpu(cmd_desc_base_addr) & CQE_UCD_BA;
 
 	while (sq_head_slot != hwq->sq_tail_slot) {
-		utrd = hwq->sqe_base_addr +
-				sq_head_slot * sizeof(struct utp_transfer_req_desc);
+		utrd = hwq->sqe_base_addr + sq_head_slot;
 		match = le64_to_cpu(utrd->command_desc_base_addr) & CQE_UCD_BA;
 		if (addr == match) {
 			ufshcd_mcq_nullify_sqe(utrd);
-- 
2.43.0







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