From: Phillip Potter <phil@philpotter.co.uk>
Date: Mon, 3 May 2021 11:56:58 +0000 (+0200)
Subject: scsi: ufs: handle cleanup correctly on devm_reset_control_get error
X-Git-Tag: v5.4.122~15
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=533ac32a80c0a5cb5c5928df6b1a1ec231634a35;p=users%2Fdwmw2%2Flinux.git

scsi: ufs: handle cleanup correctly on devm_reset_control_get error

commit 2f4a784f40f8d337d6590e2e93f46429052e15ac upstream.

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@linuxfoundation.org>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210503115736.2104747-32-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c
index b3235b3568d22..9903ce9f066cf 100644
--- a/drivers/scsi/ufs/ufs-hisi.c
+++ b/drivers/scsi/ufs/ufs-hisi.c
@@ -481,17 +481,24 @@ 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)