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iio:adc:ad_sigma_delta: Use IRQF_NO_AUTOEN rather than request and disable 

These devices are not able to mask the signal used as a data ready
interrupt.  As such they previously requested the irq then immediately
disabled it.  Now we can avoid the potential of a spurious interrupt
by avoiding the irq being auto enabled in the first place.

I'm not sure how this code could have been called with the irq already
disabled, so I believe the conditional would always have been true and
have removed it.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Alexandru Ardelean <ardeleanalex@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210402184544.488862-8-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2021-04-02 19:45:44 +01:00
parent 30f6a542b7
commit eaa17fa7d8
1 changed files with 2 additions and 5 deletions
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7
drivers/iio/adc/ad_sigma_delta.c
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@ -485,18 +485,15 @@ static int ad_sd_probe_trigger(struct iio_dev *indio_dev)
sigma_delta->trig->ops = &ad_sd_trigger_ops;
init_completion(&sigma_delta->completion);
sigma_delta->irq_dis = true;
ret = request_irq(sigma_delta->spi->irq,
ad_sd_data_rdy_trig_poll,
sigma_delta->info->irq_flags,
sigma_delta->info->irq_flags | IRQF_NO_AUTOEN,
indio_dev->name,
sigma_delta);
if (ret)
goto error_free_trig;
if (!sigma_delta->irq_dis) {
sigma_delta->irq_dis = true;
disable_irq_nosync(sigma_delta->spi->irq);
}
iio_trigger_set_drvdata(sigma_delta->trig, sigma_delta);
ret = iio_trigger_register(sigma_delta->trig);