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 <[email protected]>
Closes: https://lore.kernel.org/linux-hwmon/[email protected]/
Cc: Jonas Malaco <[email protected]>
Cc: Aleksa Savic <[email protected]>
Fixes: cbeb479ff4cd ("hwmon: (nzxt-kraken3) Decouple device names from kinds")
Acked-by: Jonas Malaco <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>

diff --git a/drivers/hwmon/nzxt-kraken3.c b/drivers/hwmon/nzxt-kraken3.c
index 0b3f04c740b0d5002296d84f8141470bae2b4cd0..00f3ac90a290117365d3d81bced8416597ac97e0 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);