linux-kernel - [PATCH v2] counter: ti-ecap-capture: Add check for clk

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Message-Id: <20241104194059.47924-1-jiashengjiangcool@gmail.com>
Date: Mon,  4 Nov 2024 19:40:59 +0000
From: Jiasheng Jiang <jiashengjiangcool@...il.com>
To: wbg@...nel.org,
	vigneshr@...com,
	jpanis@...libre.com,
	gregkh@...uxfoundation.org
Cc: linux-iio@...r.kernel.org,
	linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jiasheng Jiang <jiashengjiangcool@...il.com>
Subject: [PATCH v2] counter: ti-ecap-capture: Add check for clk_enable()

Add check for the return value of clk_enable() in order to catch the
potential exception.

Fixes: 4e2f42aa00b6 ("counter: ti-ecap-capture: capture driver support for ECAP")
Reviewed-by: Julien Panis <jpanis@...libre.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@...il.com>
---
Changelog:

v1 -> v2:

1. Add dev_err() to indicate the reason for the error code.
---
 drivers/counter/ti-ecap-capture.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/counter/ti-ecap-capture.c b/drivers/counter/ti-ecap-capture.c
index 675447315caf..b119aeede693 100644
--- a/drivers/counter/ti-ecap-capture.c
+++ b/drivers/counter/ti-ecap-capture.c
@@ -574,8 +574,13 @@ static int ecap_cnt_resume(struct device *dev)
 {
 	struct counter_device *counter_dev = dev_get_drvdata(dev);
 	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
+	int ret;
 
-	clk_enable(ecap_dev->clk);
+	ret = clk_enable(ecap_dev->clk);
+	if (ret) {
+		dev_err(dev, "Cannot enable clock %d\n", ret);
+		return ret;
+	}
 
 	ecap_cnt_capture_set_evmode(counter_dev, ecap_dev->pm_ctx.ev_mode);
 
-- 
2.25.1