scsi: ufs: Use pre-calculated offsets in ufshcd_init_lrb()

commit d5130c5 upstream.

Replace manual offset calculations for response_upiu and prd_table in
ufshcd_init_lrb() with pre-calculated offsets already stored in the
utp_transfer_req_desc structure. The pre-calculated offsets are set
differently in ufshcd_host_memory_configure() based on the
UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk, ensuring correct alignment and
access.

Fixes: 26f968d ("scsi: ufs: Introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk")
Cc: [email protected]
Signed-off-by: Avri Altman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/ufs/core/ufshcd.c

@@ -2804,9 +2804,8 @@ static void ufshcd_init_lrb(struct ufs_hba *hba, struct ufshcd_lrb *lrb, int i)
 	struct utp_transfer_req_desc *utrdlp = hba->utrdl_base_addr;
 	dma_addr_t cmd_desc_element_addr = hba->ucdl_dma_addr +
 		i * ufshcd_get_ucd_size(hba);
-	u16 response_offset = offsetof(struct utp_transfer_cmd_desc,
-				       response_upiu);
-	u16 prdt_offset = offsetof(struct utp_transfer_cmd_desc, prd_table);
+	u16 response_offset = le16_to_cpu(utrdlp[i].response_upiu_offset);
+	u16 prdt_offset = le16_to_cpu(utrdlp[i].prd_table_offset);
 
 	lrb->utr_descriptor_ptr = utrdlp + i;
 	lrb->utrd_dma_addr = hba->utrdl_dma_addr +