hwmon: (nzxt-kraken3) Bail out for unsupported device variants

Dan Carpenter reports:

Commit cbeb479ff4cd ("hwmon: (nzxt-kraken3) Decouple device names
from kinds") from Apr 28, 2024 (linux-next), leads to the following
Smatch static checker warning:

	drivers/hwmon/nzxt-kraken3.c:957 kraken3_probe()
	error: uninitialized symbol 'device_name'.

Indeed, 'device_name' will be uninitizalized if an unknown product is
encountered. In practice this should not matter because the driver
should not instantiate on unknown products, but lets play safe and
bail out if that happens.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-hwmon/b1738c50-db42-40f0-a899-9c027c131ffb@moroto.mountain/
Cc: Jonas Malaco <jonas@protocubo.io>
Cc: Aleksa Savic <savicaleksa83@gmail.com>
Fixes: cbeb479ff4cd ("hwmon: (nzxt-kraken3) Decouple device names from kinds")
Acked-by: Jonas Malaco <jonas@protocubo.io>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/nzxt-kraken3.c b/drivers/hwmon/nzxt-kraken3.c
index 0b3f04c..00f3ac9 100644 (file)
--- a/drivers/hwmon/nzxt-kraken3.c
+++ b/drivers/hwmon/nzxt-kraken3.c
@@ -928,7 +928,8 @@ static int kraken3_probe(struct hid_device *hdev, const struct hid_device_id *id
                device_name = "kraken2023elite";
                break;
        default:
-               break;
+               ret = -ENODEV;
+               goto fail_and_close;
        }
 
        priv->buffer = devm_kzalloc(&hdev->dev, MAX_REPORT_LENGTH, GFP_KERNEL);