4.17-stable review patch. If anyone has any objections, please let me know.
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From: Leonard Crestez leonard.crestez@nxp.com
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
--- drivers/iio/accel/mma8452.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -1034,7 +1034,7 @@ static irqreturn_t mma8452_interrupt(int 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) {