diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-11 06:23:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-11 06:23:37 +0100 |
| commit | f0cb9b5dfd1a6014349354e63768500a860cad53 (patch) | |
| tree | b18478292c622b7cfbc4f49dc52e1f3816ac1b99 /drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | |
| parent | b79967a27f347d39a6e0b85b49bd11963cacf5c1 (diff) | |
| parent | 31f4f5b495a62c9a8b15b1c3581acd5efeb9af8c (diff) | |
Merge 5.4-rc7 into staging-next
We want the staging fixes in here, and it resolves some merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c')
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index bbf68b474556..10d16ec5104b 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -183,9 +183,6 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) "failed to ack interrupt\n"); goto flush_fifo; } - /* handle fifo overflow by reseting fifo */ - if (int_status & INV_MPU6050_BIT_FIFO_OVERFLOW_INT) - goto flush_fifo; if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT)) { dev_warn(regmap_get_device(st->map), "spurious interrupt with status 0x%x\n", int_status); @@ -218,6 +215,18 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) if (result) goto end_session; fifo_count = get_unaligned_be16(&data[0]); + + /* + * Handle fifo overflow by resetting fifo. + * Reset if there is only 3 data set free remaining to mitigate + * possible delay between reading fifo count and fifo data. + */ + nb = 3 * bytes_per_datum; + if (fifo_count >= st->hw->fifo_size - nb) { + dev_warn(regmap_get_device(st->map), "fifo overflow reset\n"); + goto flush_fifo; + } + /* compute and process all complete datum */ nb = fifo_count / bytes_per_datum; inv_mpu6050_update_period(st, pf->timestamp, nb); |