linux-kernel - [PATCH 5.16 044/203] scsi: ufs: ufshcd-pltfrm: Check the return value of devm

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Message-Id: <20220214092511.713387573@linuxfoundation.org>
Date:   Mon, 14 Feb 2022 10:24:48 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bean Huo <beanhuo@...ron.com>,
        Xiaoke Wang <xkernel.wang@...mail.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 044/203] scsi: ufs: ufshcd-pltfrm: Check the return value of devm_kstrdup()

From: Xiaoke Wang <xkernel.wang@...mail.com>

[ Upstream commit a65b32748f4566f986ba2495a8236c141fa42a26 ]

devm_kstrdup() returns pointer to allocated string on success, NULL on
failure. So it is better to check the return value of it.

Link: https://lore.kernel.org/r/tencent_4257E15D4A94FF9020DDCC4BB9B21C041408@qq.com
Reviewed-by: Bean Huo <beanhuo@...ron.com>
Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/ufs/ufshcd-pltfrm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index 8b16bbbcb806c..87975d1a21c8b 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -92,6 +92,11 @@ static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 		clki->min_freq = clkfreq[i];
 		clki->max_freq = clkfreq[i+1];
 		clki->name = devm_kstrdup(dev, name, GFP_KERNEL);
+		if (!clki->name) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
 		if (!strcmp(name, "ref_clk"))
 			clki->keep_link_active = true;
 		dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz",
@@ -127,6 +132,8 @@ static int ufshcd_populate_vreg(struct device *dev, const char *name,
 		return -ENOMEM;
 
 	vreg->name = devm_kstrdup(dev, name, GFP_KERNEL);
+	if (!vreg->name)
+		return -ENOMEM;
 
 	snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
 	if (of_property_read_u32(np, prop_name, &vreg->max_uA)) {
-- 
2.34.1