iio: mma8452: Fix ignoring MMA8452_INT_DRDY

commit b02ec67a8e38875cdc5f9214be885022f11c0017 upstream.

Interrupts are ignored if no event bit is set in the status status
register and this breaks the buffer interface. No data is shown when
running "iio_generic_buffer -n mma8451 -a" and interrupt counts go
crazy.

Fix by not returning IRQ_NONE if DRDY is set.

Fixes: 605f72de137a ("iio: accel: mma8452: improvements to handle
multiple events")

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 7a2da7f9d4dcf33ee6ee28aaf30c9d61e2a455da..5485b35fe553971f885ad950baafbf1f9311fe23 100644 (file)
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1034,7 +1034,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
        if (src < 0)
                return IRQ_NONE;
 
-       if (!(src & data->chip_info->enabled_events))
+       if (!(src & (data->chip_info->enabled_events | MMA8452_INT_DRDY)))
                return IRQ_NONE;
 
        if (src & MMA8452_INT_DRDY) {