From: Nuno Sa <nuno.sa@analog.com>
Date: Thu, 22 Apr 2021 10:19:03 +0000 (+0200)
Subject: iio: adis_buffer: do not return ints in irq handlers
X-Git-Tag: v4.4.276~113
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ff9834a9d6eb4b6e22b54f86393a0718badfdb6;p=thirdparty%2Fkernel%2Fstable.git

iio: adis_buffer: do not return ints in irq handlers

[ Upstream commit d877539ad8e8fdde9af69887055fec6402be1a13 ]

On an IRQ handler we should not return normal error codes as 'irqreturn_t'
is expected.

Not necessarily stable material as the old check cannot fail, so it's a bug
we can not hit.

Fixes: ccd2b52f4ac69 ("staging:iio: Add common ADIS library")
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210422101911.135630-2-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c
index 9de553e8c214f..625f54d9e382f 100644
--- a/drivers/iio/imu/adis_buffer.c
+++ b/drivers/iio/imu/adis_buffer.c
@@ -83,9 +83,6 @@ static irqreturn_t adis_trigger_handler(int irq, void *p)
 	struct adis *adis = iio_device_get_drvdata(indio_dev);
 	int ret;
 
-	if (!adis->buffer)
-		return -ENOMEM;
-
 	if (adis->data->has_paging) {
 		mutex_lock(&adis->txrx_lock);
 		if (adis->current_page != 0) {