This is a note to let you know that I've just added the patch titled
iio: dln2: Check return value of devm_iio_trigger_register()
to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 90751fb9f224e0e1555b49a8aa9e68f6537e4cec Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen lars@metafoo.de Date: Mon, 1 Nov 2021 14:30:43 +0100 Subject: iio: dln2: Check return value of devm_iio_trigger_register()
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: 7c0299e879dd ("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 --- drivers/iio/adc/dln2-adc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c index 6c67192946aa..97d162a3cba4 100644 --- a/drivers/iio/adc/dln2-adc.c +++ b/drivers/iio/adc/dln2-adc.c @@ -655,7 +655,11 @@ 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,