From: Jean-Baptiste Maneyrol Date: Mon, 19 Feb 2024 15:48:25 +0000 (+0000) Subject: iio: imu: inv_mpu6050: fix FIFO parsing when empty X-Git-Tag: v6.7.12~145 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4258f4b7130f86407d3decc4fc6a20ead4048b2;p=thirdparty%2Fkernel%2Fstable.git iio: imu: inv_mpu6050: fix FIFO parsing when empty commit 60caa8b33bd682a9ed99d1fc3f91d74e1acc9922 upstream. Now that we are reading the full FIFO in the interrupt handler, it is possible to have an emply FIFO since we are still receiving 1 interrupt per data. Handle correctly this case instead of having an error causing a reset of the FIFO. Fixes: 0829edc43e0a ("iio: imu: inv_mpu6050: read the full fifo when processing data") Cc: stable@vger.kernel.org Signed-off-by: Jean-Baptiste Maneyrol Link: https://lore.kernel.org/r/20240219154825.90656-1-inv.git-commit@tdk.com Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 66d4ba088e70f..d4f9b5d8d28d6 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -109,6 +109,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) /* compute and process only all complete datum */ nb = fifo_count / bytes_per_datum; fifo_count = nb * bytes_per_datum; + if (nb == 0) + goto end_session; /* Each FIFO data contains all sensors, so same number for FIFO and sensor data */ fifo_period = NSEC_PER_SEC / INV_MPU6050_DIVIDER_TO_FIFO_RATE(st->chip_config.divider); inv_sensors_timestamp_interrupt(&st->timestamp, fifo_period, nb, nb, pf->timestamp);