scsi: ufs: Fix illegal offset in UPIU event trace

Fix incorrect index for UTMRD reference in ufshcd_add_tm_upiu_trace().

Link: https://lore.kernel.org/r/20210924085848.25500-1-jonathan.hsu@mediatek.com
Fixes: 4b42d557a8ad ("scsi: ufs: core: Fix wrong Task Tag used in task management request UPIUs")
Cc: stable@vger.kernel.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jonathan Hsu <jonathan.hsu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 029c963..188de6f 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -318,8 +318,7 @@ static void ufshcd_add_query_upiu_trace(struct ufs_hba *hba,
 static void ufshcd_add_tm_upiu_trace(struct ufs_hba *hba, unsigned int tag,
                                     enum ufs_trace_str_t str_t)
 {
-       int off = (int)tag - hba->nutrs;
-       struct utp_task_req_desc *descp = &hba->utmrdl_base_addr[off];
+       struct utp_task_req_desc *descp = &hba->utmrdl_base_addr[tag];
 
        if (!trace_ufshcd_upiu_enabled())
                return;