linux-kernel - [PATCH 4.14 120/315] iio: adis_buffer: do not return ints in irq handlers

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Date:   Mon, 19 Jul 2021 16:50:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Alexandru Ardelean <ardeleanalex@...il.com>,
        Nuno Sa <nuno.sa@...log.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 120/315] iio: adis_buffer: do not return ints in irq handlers

From: Nuno Sa <nuno.sa@...log.com>

[ 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@...il.com>
Signed-off-by: Nuno Sa <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20210422101911.135630-2-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/imu/adis_buffer.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c
index 9de553e8c214..625f54d9e382 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) {
-- 
2.30.2