In some architectures, an unit of PRDTO and PRDTL
in UFSHCI spec assume bytes, not double word specified
in the spec. W/o this patch, when the driver executes
this, kernel panic occurres because of abnormal accesses.
Signed-off-by: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f4aa10fdbb0c..94c4a0f9fd9b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -462,8 +462,12 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
ufshcd_hex_dump("UPIU RSP: ", lrbp->ucd_rsp_ptr,
sizeof(struct utp_upiu_rsp));
- prdt_length = le16_to_cpu(
- lrbp->utr_descriptor_ptr->prd_table_length);
+ if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN)
+ prdt_length = le16_to_cpu(lrbp->utr_descriptor_ptr->prd_table_length)
+ / sizeof(struct ufshcd_sg_entry);
+ else
+ prdt_length = le16_to_cpu(lrbp->utr_descriptor_ptr->prd_table_length);
+
dev_err(hba->dev,
"UPIU[%d] - PRDT - %d entries phys@0x%llx\n",
tag, prdt_length,
--
2.14.2
