linux-kernel - [PATCH] net: ethernet: lpc_eth: Handle error for clk

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Date:   Tue,  8 Mar 2022 14:57:39 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     vz@...ia.com, davem@...emloft.net, kuba@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] net: ethernet: lpc_eth: 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: b7370112f519 ("lpc32xx: Added ethernet driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/net/ethernet/nxp/lpc_eth.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index bc39558fe82b..756f97dce85b 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1471,6 +1471,7 @@ static int lpc_eth_drv_resume(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct netdata_local *pldat;
+	int ret;
 
 	if (device_may_wakeup(&pdev->dev))
 		disable_irq_wake(ndev->irq);
@@ -1480,7 +1481,9 @@ static int lpc_eth_drv_resume(struct platform_device *pdev)
 			pldat = netdev_priv(ndev);
 
 			/* Enable interface clock */
-			clk_enable(pldat->clk);
+			ret = clk_enable(pldat->clk);
+			if (ret)
+				return ret;
 
 			/* Reset and initialize */
 			__lpc_eth_reset(pldat);
-- 
2.25.1