linux-kernel - [PATCH v1 1/1] ACPI: battery: Check for error code from devm_mutex

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Message-ID: <20241030162754.2110946-1-andriy.shevchenko@linux.intel.com>
Date: Wed, 30 Oct 2024 18:27:54 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] ACPI: battery: Check for error code from devm_mutex_init() call

Even if it's not critical, the avoidance of checking the error code
from devm_mutex_init() call today diminishes the point of using devm
variant of it. Tomorrow it may even leak something. Add the missed
check.

Fixes: 0710c1ce5045 ("ACPI: battery: initialize mutexes through devm_ APIs")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/acpi/battery.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 66662712e288..70f706d7634f 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -1226,8 +1226,12 @@ static int acpi_battery_add(struct acpi_device *device)
 	strscpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
 	strscpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
 	device->driver_data = battery;
-	devm_mutex_init(&device->dev, &battery->lock);
-	devm_mutex_init(&device->dev, &battery->sysfs_lock);
+	result = devm_mutex_init(&device->dev, &battery->lock);
+	if (result)
+		return result;
+	result = devm_mutex_init(&device->dev, &battery->sysfs_lock);
+	if (result)
+		return result;
 	if (acpi_has_method(battery->device->handle, "_BIX"))
 		set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
 
-- 
2.43.0.rc1.1336.g36b5255a03ac