linux-kernel - [PATCH 31/69] scsi: ufs: handle cleanup correctly on devm_reset_control

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Message-Id: <20210503115736.2104747-32-gregkh@linuxfoundation.org>
Date:   Mon,  3 May 2021 13:56:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Phillip Potter <phil@...lpotter.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Avri Altman <avri.altman@....com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        stable <stable@...r.kernel.org>
Subject: [PATCH 31/69] scsi: ufs: handle cleanup correctly on devm_reset_control_get error

From: Phillip Potter <phil@...lpotter.co.uk>

Move ufshcd_set_variant call in ufs_hisi_init_common to common error
section at end of the function, and then jump to this from the error
checking statements for both devm_reset_control_get and
ufs_hisi_get_resource. This fixes the original commit (63a06181d7ce)
which was reverted due to the University of Minnesota problems.

Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Avri Altman <avri.altman@....com>
Cc: Martin K. Petersen <martin.petersen@...cle.com>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Phillip Potter <phil@...lpotter.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/ufs/ufs-hisi.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c
index 7d1e07a9d9dd..d0626773eb38 100644
--- a/drivers/scsi/ufs/ufs-hisi.c
+++ b/drivers/scsi/ufs/ufs-hisi.c
@@ -467,17 +467,24 @@ static int ufs_hisi_init_common(struct ufs_hba *hba)
 	host->hba = hba;
 	ufshcd_set_variant(hba, host);
 
-	host->rst  = devm_reset_control_get(dev, "rst");
+	host->rst = devm_reset_control_get(dev, "rst");
+	if (IS_ERR(host->rst)) {
+		dev_err(dev, "%s: failed to get reset control\n", __func__);
+		err = PTR_ERR(host->rst);
+		goto error;
+	}
 
 	ufs_hisi_set_pm_lvl(hba);
 
 	err = ufs_hisi_get_resource(host);
-	if (err) {
-		ufshcd_set_variant(hba, NULL);
-		return err;
-	}
+	if (err)
+		goto error;
 
 	return 0;
+
+error:
+	ufshcd_set_variant(hba, NULL);
+	return err;
 }
 
 static int ufs_hi3660_init(struct ufs_hba *hba)
-- 
2.31.1