platform/x86: thinkpad_acpi: check the return value of devm_mutex_init()

devm_mutex_init() can fail so check its return value.

Fixes: 38b9ab8 ("platform/x86: thinkpad_acpi: Move subdriver initialization to tpacpi_pdriver's probe.")
Signed-off-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Ilpo Järvinen <[email protected]>

Author: Bartosz Golaszewski

drivers/platform/x86/thinkpad_acpi.c

@@ -11849,7 +11849,9 @@ static int __init tpacpi_pdriver_probe(struct platform_device *pdev)
 {
 	int ret;
 
-	devm_mutex_init(&pdev->dev, &tpacpi_inputdev_send_mutex);
+	ret = devm_mutex_init(&pdev->dev, &tpacpi_inputdev_send_mutex);
+	if (ret)
+		return ret;
 
 	tpacpi_inputdev = devm_input_allocate_device(&pdev->dev);
 	if (!tpacpi_inputdev)