linux-kernel - [PATCH] can: m_can: Add check for devm_clk

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Date:   Wed, 23 Nov 2022 14:36:51 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     rcsekar@...sung.com, wg@...ndegger.com, mkl@...gutronix.de,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] can: m_can: Add check for devm_clk_get

Since the devm_clk_get may return error,
it should be better to add check for the cdev->hclk,
as same as cdev->cclk.

Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/net/can/m_can/m_can.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 00d11e95fd98..e5575d2755e4 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1909,7 +1909,7 @@ int m_can_class_get_clocks(struct m_can_classdev *cdev)
 	cdev->hclk = devm_clk_get(cdev->dev, "hclk");
 	cdev->cclk = devm_clk_get(cdev->dev, "cclk");
 
-	if (IS_ERR(cdev->cclk)) {
+	if (IS_ERR(cdev->hclk) || IS_ERR(cdev->cclk)) {
 		dev_err(cdev->dev, "no clock found\n");
 		ret = -ENODEV;
 	}
-- 
2.25.1