linux-kernel - [PATCH 1/3] scsi: ufs: retry link startup if that fails and device state is not active

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Message-Id: <20210205013633.16243-1-dh0421.hwang@samsung.com>
Date:   Fri,  5 Feb 2021 10:36:31 +0900
From:   DooHyun Hwang <dh0421.hwang@...sung.com>
To:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, stanley.chu@...iatek.com,
        cang@...eaurora.org, asutoshd@...eaurora.org, beanhuo@...ron.com,
        jaegeuk@...nel.org, adrian.hunter@...el.com, satyat@...gle.com
Cc:     grant.jung@...sung.com, jt77.jang@...sung.com,
        junwoo80.lee@...sung.com, jangsub.yi@...sung.com,
        sh043.lee@...sung.com, cw9316.lee@...sung.com,
        sh8267.baek@...sung.com, wkon.kim@...sung.com,
        DooHyun Hwang <dh0421.hwang@...sung.com>
Subject: [PATCH 1/3] scsi: ufs: retry link startup if that fails and device
 state is not active

Remove unnecessary link startup command if it was completed.

UniPro stack is reset and enabled when ufshc is enabled.
The link startup command is issued after enabling ufshc,
if link startup is completed, there is no needed to issue again.

Signed-off-by: DooHyun Hwang <dh0421.hwang@...sung.com>
---
 drivers/scsi/ufs/ufshcd.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 721f55db181f..286f7c918f0e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4642,13 +4642,13 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
 		ufshcd_update_evt_hist(hba,
 				       UFS_EVT_LINK_STARTUP_FAIL,
 				       (u32)ret);
-		goto out;
-	}
 
-	if (link_startup_again) {
-		link_startup_again = false;
-		retries = DME_LINKSTARTUP_RETRIES;
-		goto link_startup;
+		if (link_startup_again) {
+			link_startup_again = false;
+			retries = DME_LINKSTARTUP_RETRIES;
+			goto link_startup;
+		}
+		goto out;
 	}
 
 	/* Mark that link is up in PWM-G1, 1-lane, SLOW-AUTO mode */
-- 
2.29.0