iio: adis16400: do not return ints in irq handlers

[ Upstream commit ab3df79782e7d8a27a58576c9b4e8c6c4879ad79 ]

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

Not necessary to apply to stable as the original check cannot fail and
as such the bug cannot actually occur.

Fixes: 5eda3550a3cc1 ("staging:iio:adis16400: Preallocate transfer message")
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210422101911.135630-3-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/adis16400.c b/drivers/iio/imu/adis16400.c
index 785a4ce..4aff164 100644 (file)
--- a/drivers/iio/imu/adis16400.c
+++ b/drivers/iio/imu/adis16400.c
@@ -647,9 +647,6 @@ static irqreturn_t adis16400_trigger_handler(int irq, void *p)
        void *buffer;
        int ret;
 
-       if (!adis->buffer)
-               return -ENOMEM;
-
        if (!(st->variant->flags & ADIS16400_NO_BURST) &&
                st->adis.spi->max_speed_hz > ADIS16400_SPI_BURST) {
                st->adis.spi->max_speed_hz = ADIS16400_SPI_BURST;