linux-kernel - [PATCH V3] net: rfkill: gpio: Add check for clk

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Message-Id: <20241108195341.1853080-1-zmw12306@gmail.com>
Date: Fri,  8 Nov 2024 14:53:41 -0500
From: Mingwei Zheng <zmw12306@...il.com>
To: johannes@...solutions.net
Cc: linville@...driver.com,
	rklein@...dia.com,
	linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mingwei Zheng <zmw12306@...il.com>,
	Jiasheng Jiang <jiashengjiangcool@...il.com>
Subject: [PATCH V3] net: rfkill: gpio: Add check for clk_enable()

Add check for the return value of clk_enable() to catch the potential
error.

Fixes: 7176ba23f8b5 ("net: rfkill: add generic gpio rfkill driver")
Signed-off-by: Mingwei Zheng <zmw12306@...il.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@...il.com>
---
Changelog:

v2 -> v3

1. Move int ret declaration into if.
2. Replace if (!ret) with if (ret).

v1 -> v2

1. Replace expection with error in commit msg.
---
 net/rfkill/rfkill-gpio.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
index c268c2b011f4..a8e21060112f 100644
--- a/net/rfkill/rfkill-gpio.c
+++ b/net/rfkill/rfkill-gpio.c
@@ -32,8 +32,12 @@ static int rfkill_gpio_set_power(void *data, bool blocked)
 {
 	struct rfkill_gpio_data *rfkill = data;
 
-	if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled)
-		clk_enable(rfkill->clk);
+	if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled) {
+		int ret = clk_enable(rfkill->clk);
+
+		if (ret)
+			return ret;
+	}
 
 	gpiod_set_value_cansleep(rfkill->shutdown_gpio, !blocked);
 	gpiod_set_value_cansleep(rfkill->reset_gpio, !blocked);
-- 
2.34.1