Currently IRQ_NONE is returned only when there is no data on the fifo. When there is no data on the fifo the driver can not push to the buffers and therefore user space readers polling for data available will not be awoken and continue to wait.
This commit just extends the same semantics to fifo read errors. Signed-off-by: Jorge Ramirez-Ortiz <[email protected]> --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index 4994f92..4959923 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -472,7 +472,7 @@ static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) count = st_lsm6dsx_read_fifo(hw); mutex_unlock(&hw->fifo_lock); - return !count ? IRQ_NONE : IRQ_HANDLED; + return (!count || count < 0) ? IRQ_NONE : IRQ_HANDLED; } static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev) -- 2.7.4
