i2c: acpi: put device when verifying client fails

commit 8daee952 upstream.

i2c_verify_client() can fail, so we need to put the device when that
happens.

Fixes: 525e6fab ("i2c / ACPI: add support for ACPI reconfigure notifications")
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/i2c/i2c-core-acpi.c

@@ -352,10 +352,18 @@ static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
 static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev)
 {
 	struct device *dev;
+	struct i2c_client *client;
 
 	dev = bus_find_device(&i2c_bus_type, NULL, adev,
 			      i2c_acpi_find_match_device);
-	return dev ? i2c_verify_client(dev) : NULL;
+	if (!dev)
+		return NULL;
+
+	client = i2c_verify_client(dev);
+	if (!client)
+		put_device(dev);
+
+	return client;
 }
 
 static int i2c_acpi_notify(struct notifier_block *nb, unsigned long value,