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iio: dln2: Check return value of devm_iio_trigger_register()

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commit 90751fb9f2 upstream.

Registering a trigger can fail and the return value of
devm_iio_trigger_register() must be checked. Otherwise undefined behavior
can occur when the trigger is used.

Fixes: 7c0299e879 ("iio: adc: Add support for DLN2 ADC")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101133043.6974-1-lars@metafoo.de
Cc: <stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lars-Peter Clausen
2021-11-01 14:30:43 +01:00
committed by Greg Kroah-Hartman
parent 69ae78c1ab
commit a2545b147d
1 changed files with 5 additions and 1 deletions
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6
drivers/iio/adc/dln2-adc.c
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@@ -654,7 +654,11 @@ static int dln2_adc_probe(struct platform_device *pdev)
return -ENOMEM;
}
iio_trigger_set_drvdata(dln2->trig, dln2);
devm_iio_trigger_register(dev, dln2->trig);
ret = devm_iio_trigger_register(dev, dln2->trig);
if (ret) {
dev_err(dev, "failed to register trigger: %d\n", ret);
return ret;
}
iio_trigger_set_immutable(indio_dev, dln2->trig);
ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,