From 4a56c646e1bd4f22a2dcd65ef3723af957c651a9 Mon Sep 17 00:00:00 2001 From: Francesco Lavra Date: Fri, 31 Jul 2026 19:47:02 +0200 Subject: [PATCH] iio: imu: st_lsm6dsx: Update enable mask when using sensor fusion The enable_mask struct member keeps track of which sensors are enabled in the IMU. When enabling and disabling the sensor fusion functionality, the driver does not properly update this struct member. This prevents a correct calculation of the number of samples that should be read from the hardware FIFO; as a result, reads from the FIFO can be unnecessarily split into multiple transactions, some of which can read past the FIFO length. Fixes: cd4e1141bff8 ("iio: imu: st_lsm6dsx: Add support for rotation sensor") Signed-off-by: Francesco Lavra Acked-by: Lorenzo Bianconi Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c index 2e72c7ba94dd..5321033daebc 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c @@ -112,6 +112,11 @@ int st_lsm6dsx_fusion_set_enable(struct st_lsm6dsx_sensor *sensor, bool enable) return err; } + if (enable) + hw->enable_mask |= BIT(ST_LSM6DSX_ID_FUSION); + else + hw->enable_mask &= ~BIT(ST_LSM6DSX_ID_FUSION); + return st_lsm6dsx_fusion_page_disable(hw); }