From: Bean Huo <[email protected]>
Currently, in the query completion trace print, since we use
hba->lrb[tag].ucd_req_ptr and didn't differentiate UPIU between
request and response, thus header and transaction-specific field
in UPIU printed by query trace are identical. This is not very
practical. As below:
query_send: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00
query_complete: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00
For the failure analysis, we want to understand the real response
reported by the UFS device, however, the current query trace tells
us nothing. After this patch, the query trace on the query_send, and
the above a pair of query_send and query_complete will be:
query_send: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00
ufshcd_upiu: HDR:36 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 01 00 00 00 00
Acked-by: Avri Altman <[email protected]>
Signed-off-by: Bean Huo <[email protected]>
---
drivers/scsi/ufs/ufshcd.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index da677147755d..93d820b69617 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -321,12 +321,18 @@ static void ufshcd_add_cmd_upiu_trace(struct ufs_hba *hba, unsigned int tag,
static void ufshcd_add_query_upiu_trace(struct ufs_hba *hba, unsigned int tag,
enum ufs_trace_str_t str_t)
{
- struct utp_upiu_req *rq = hba->lrb[tag].ucd_req_ptr;
+ struct utp_upiu_req *rq_rsp;
if (!trace_ufshcd_upiu_enabled())
return;
- trace_ufshcd_upiu(dev_name(hba->dev), str_t, &rq->header, &rq->qr);
+ if (str_t == UFS_QUERY_SEND)
+ rq_rsp = hba->lrb[tag].ucd_req_ptr;
+ else
+ rq_rsp = (struct utp_upiu_req *)hba->lrb[tag].ucd_rsp_ptr;
+
+ trace_ufshcd_upiu(dev_name(hba->dev), str_t, &rq_rsp->header,
+ &rq_rsp->qr);
}
static void ufshcd_add_tm_upiu_trace(struct ufs_hba *hba, unsigned int tag,
--
2.17.1