linux-kernel - [PATCH] mmc: davinci_mmc: Handle error for clk

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Message-Id: <20220308071415.1093393-1-jiasheng@iscas.ac.cn>
Date:   Tue,  8 Mar 2022 15:14:15 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] mmc: davinci_mmc: Handle error for clk_enable

As the potential failure of the clk_enable(),
it should be better to check it and return error
if fails.

Fixes: bbce5802afc5 ("davinci: mmc: updates to suspend/resume implementation")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/mmc/host/davinci_mmc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 2a757c88f9d2..80de660027d8 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1375,8 +1375,12 @@ static int davinci_mmcsd_suspend(struct device *dev)
 static int davinci_mmcsd_resume(struct device *dev)
 {
 	struct mmc_davinci_host *host = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_enable(host->clk);
+	if (ret)
+		return ret;
 
-	clk_enable(host->clk);
 	mmc_davinci_reset_ctrl(host, 0);
 
 	return 0;
-- 
2.25.1