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hwmon: (iio_hwmon) use dev_err_probe 

Instead of just returning an error code, add an error message as well.
While at it, simplify the code and use a common return path.
Upon deferral this also nicely lists the following message in
/sys/kernel/debug/devices_deferred:
adc     iio_hwmon: Failed to get channels

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230131103359.625081-1-alexander.stein@ew.tq-group.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Alexander Stein 2023-01-31 11:33:59 +01:00 committed by Guenter Roeck
parent e1983220ae
commit 1c999af509
1 changed files with 5 additions and 3 deletions
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8
drivers/hwmon/iio_hwmon.c
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@ -77,9 +77,11 @@ static int iio_hwmon_probe(struct platform_device *pdev)
channels = devm_iio_channel_get_all(dev);
if (IS_ERR(channels)) {
if (PTR_ERR(channels) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(channels);
ret = PTR_ERR(channels);
if (ret == -ENODEV)
ret = -EPROBE_DEFER;
return dev_err_probe(dev, ret,
"Failed to get channels\n");
}
st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL);