[PATCH 7/7] iio:adc:ad_sigma_delta: Use IRQF_NO_AUTOEN rather than request and disable

[Jonathan Cameron <jic23@kernel.org>]

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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>
---
 drivers/iio/adc/ad_sigma_delta.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 9289812c0a94..e777ec718973 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -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);
-- 
2.31.1