linux-kernel - [PATCH] scsi: ufs: clear uac for RPMB after ufshcd resets

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Date:   Mon, 30 Nov 2020 20:14:02 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        kernel-team@...roid.com
Cc:     cang@...eaurora.org, alim.akhtar@...sung.com, avri.altman@....com,
        bvanassche@....org, martin.petersen@...cle.com,
        stanley.chu@...iatek.com, Randall Huang <huangrandall@...gle.com>,
        Leo Liou <leoliou@...gle.com>, Jaegeuk Kim <jaegeuk@...gle.com>
Subject: [PATCH] scsi: ufs: clear uac for RPMB after ufshcd resets

From: Randall Huang <huangrandall@...gle.com>

If RPMB is not provisioned, we may see RPMB failure after UFS suspend/resume.
Inject request_sense to clear uac in ufshcd reset flow.

Signed-off-by: Randall Huang <huangrandall@...gle.com>
Signed-off-by: Leo Liou <leoliou@...gle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...gle.com>
---
 drivers/scsi/ufs/ufshcd.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index dba3ee307307..c728c00b58db 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -220,6 +220,7 @@ static int ufshcd_reset_and_restore(struct ufs_hba *hba);
 static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd);
 static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag);
 static void ufshcd_hba_exit(struct ufs_hba *hba);
+static int ufshcd_clear_ua_wluns(struct ufs_hba *hba);
 static int ufshcd_probe_hba(struct ufs_hba *hba, bool async);
 static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
 				 bool skip_ref_clk);
@@ -6814,7 +6815,8 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba)
 
 	/* Establish the link again and restore the device */
 	err = ufshcd_probe_hba(hba, false);
-
+	if (!err)
+		ufshcd_clear_ua_wluns(hba);
 out:
 	if (err)
 		dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err);
@@ -8304,13 +8306,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	 * handling context.
 	 */
 	hba->host->eh_noresume = 1;
-	if (hba->wlun_dev_clr_ua) {
-		ret = ufshcd_send_request_sense(hba, sdp);
-		if (ret)
-			goto out;
-		/* Unit attention condition is cleared now */
-		hba->wlun_dev_clr_ua = false;
-	}
+	ufshcd_clear_ua_wluns(hba);
 
 	cmd[4] = pwr_mode << 4;
 
-- 
2.29.2.454.gaff20da3a2-goog