linux-hardening - Coverity: mlx90632_probe(): Error handling issues

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Date:   Fri, 4 Nov 2022 12:35:22 -0700
From:   coverity-bot <keescook@...omium.org>
To:     Crt Mori <cmo@...exis.com>
Cc:     linux-iio@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
        linux-kernel@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: mlx90632_probe(): Error handling issues

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221104 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  Thu Nov 3 21:42:26 2022 +0000
    c83d3e5ca97f ("iio: temperature: mlx90632 Add runtime powermanagement modes")

Coverity reported the following:

*** CID 1527134:  Error handling issues  (CHECKED_RETURN)
drivers/iio/temperature/mlx90632.c:1270 in mlx90632_probe()
1264     	mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
1265     	mlx90632->interaction_ts = jiffies; /* Set initial value */
1266
1267     	pm_runtime_get_noresume(&client->dev);
1268     	pm_runtime_set_active(&client->dev);
1269
vvv     CID 1527134:  Error handling issues  (CHECKED_RETURN)
vvv     Calling "devm_pm_runtime_enable" without checking return value (as is done elsewhere 21 out of 24 times).
1270     	devm_pm_runtime_enable(&client->dev);
1271     	pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
1272     	pm_runtime_use_autosuspend(&client->dev);
1273     	pm_runtime_put_autosuspend(&client->dev);
1274
1275     	return devm_iio_device_register(&client->dev, indio_dev);

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527134 ("Error handling issues")
Fixes: c83d3e5ca97f ("iio: temperature: mlx90632 Add runtime powermanagement modes")

Thanks for your attention!

-- 
Coverity-bot