linux-kernel - [PATCH 5.1 352/405] scsi: ufs: fix a missing check of devm_reset_control

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Message-Id: <20190530030558.473851295@linuxfoundation.org>
Date:   Wed, 29 May 2019 20:05:50 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kangjie Lu <kjlu@....edu>,
        Avri Altman <avri.altman@....com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 352/405] scsi: ufs: fix a missing check of devm_reset_control_get

[ Upstream commit 63a06181d7ce169d09843645c50fea1901bc9f0a ]

devm_reset_control_get could fail, so the fix checks its return value and
passes the error code upstream in case it fails.

Signed-off-by: Kangjie Lu <kjlu@....edu>
Acked-by: Avri Altman <avri.altman@....com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/ufs/ufs-hisi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c
index 0e855b5afe82a..2f592df921d97 100644
--- a/drivers/scsi/ufs/ufs-hisi.c
+++ b/drivers/scsi/ufs/ufs-hisi.c
@@ -587,6 +587,10 @@ static int ufs_hisi_init_common(struct ufs_hba *hba)
 	ufshcd_set_variant(hba, host);
 
 	host->rst  = devm_reset_control_get(dev, "rst");
+	if (IS_ERR(host->rst)) {
+		dev_err(dev, "%s: failed to get reset control\n", __func__);
+		return PTR_ERR(host->rst);
+	}
 
 	ufs_hisi_set_pm_lvl(hba);
 
-- 
2.20.1