linux-kernel - [PATCH v4 01/11] thermal/hwmon: Add error information printing for devm_thermal_add_hwmon

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Message-Id: <20230620090732.50025-1-frank.li@vivo.com>
Date:   Tue, 20 Jun 2023 17:07:22 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     glaroque@...libre.com, rafael@...nel.org,
        daniel.lezcano@...aro.org, amitk@...nel.org, rui.zhang@...el.com,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, agross@...nel.org,
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Cc:     linux-pm@...r.kernel.org, linux-amlogic@...ts.infradead.org,
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        linux-mediatek@...ts.infradead.org, Yangtao Li <frank.li@...o.com>
Subject: [PATCH v4 01/11] thermal/hwmon: Add error information printing for devm_thermal_add_hwmon_sysfs()

Ensure that all error handling branches print error information. In this
way, when this function fails, the upper-layer functions can directly
return an error code without missing debugging information. Otherwise,
the error message will be printed redundantly or missing.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
v4:
-merge two generic-adc patch into one
v3:
-cleanup lvts_thermal
v2:
-convert to dev_warn
 drivers/thermal/thermal_hwmon.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
index fbe55509e307..c3ae44659b81 100644
--- a/drivers/thermal/thermal_hwmon.c
+++ b/drivers/thermal/thermal_hwmon.c
@@ -271,11 +271,14 @@ int devm_thermal_add_hwmon_sysfs(struct device *dev, struct thermal_zone_device
 
 	ptr = devres_alloc(devm_thermal_hwmon_release, sizeof(*ptr),
 			   GFP_KERNEL);
-	if (!ptr)
+	if (!ptr) {
+		dev_warn(dev, "Failed to allocate device resource data\n");
 		return -ENOMEM;
+	}
 
 	ret = thermal_add_hwmon_sysfs(tz);
 	if (ret) {
+		dev_warn(dev, "Failed to add hwmon sysfs attributes\n");
 		devres_free(ptr);
 		return ret;
 	}
-- 
2.39.0