From 89ac2c3b283508744de9bc2fba2b57a523990db7 Mon Sep 17 00:00:00 2001 From: Bean Huo Date: Mon, 31 May 2021 12:43:06 +0200 Subject: [PATCH] scsi: ufs: core: Let UPIU completion trace print RSP UPIU header MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The current UPIU completion event trace still prints the COMMAND UPIU header, rather than the RSP UPIU header. This makes UPIU command trace useless in problem shooting in case we receive a trace log from the customer/field. There are two important fields in RSP UPIU: 1. The response field, which indicates the UFS defined overall success or failure of the series of Command, Data and RESPONSE UPIU’s that make up the execution of a task. 2. The Status field, which contains the command set specific status for a specific command issued by the initiator device. Before this commit, the UPIU paired trace events: ufshcd_upiu: send_req: fe3b0000.ufs: HDR:01 20 00 1c 00 00 00 00 00 00 00 00, CDB:3b e1 00 00 00 00 00 00 30 00 00 00 00 00 00 00 ufshcd_upiu: complete_rsp: fe3b0000.ufs: HDR:01 20 00 1c 00 00 00 00 00 00 00 00, CDB:3b e1 00 00 00 00 00 00 30 00 00 00 00 00 00 00 After this commit: ufshcd_upiu: send_req: fe3b0000.ufs: HDR:01 20 00 1c 00 00 00 00 00 00 00 00, CDB:3b e1 00 00 00 00 00 00 30 00 00 00 00 00 00 00 ufshcd_upiu: complete_rsp: fe3b0000.ufs: HDR:21 00 00 1c 00 00 00 00 00 00 00 00, CDB:3b e1 00 00 00 00 00 00 30 00 00 00 00 00 00 00 Link: https://lore.kernel.org/r/20210531104308.391842-3-huobean@gmail.com Reviewed-by: Can Guo Signed-off-by: Bean Huo Signed-off-by: Martin K. Petersen --- drivers/scsi/ufs/ufshcd.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 4565fdd8f207..1098f7a94993 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -302,11 +302,17 @@ static void ufshcd_add_cmd_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_header *header; if (!trace_ufshcd_upiu_enabled()) return; - trace_ufshcd_upiu(dev_name(hba->dev), str_t, &rq->header, &rq->sc.cdb, + if (str_t == UFS_CMD_SEND) + header = &rq->header; + else + header = &hba->lrb[tag].ucd_rsp_ptr->header; + + trace_ufshcd_upiu(dev_name(hba->dev), str_t, header, &rq->sc.cdb, UFS_TSF_CDB); } -- 2.11.0