6.6-stable review patch. If anyone has any objections, please let me know.
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From: Silvano Seva s.seva@4sigma.it
commit 8114ef86e2058e2554111b793596f17bee23fa15 upstream.
Prevent st_lsm6dsx_read_tagged_fifo from falling in an infinite loop in case pattern_len is equal to zero and the device FIFO is not empty.
Fixes: 801a6e0af0c6 ("iio: imu: st_lsm6dsx: add support to LSM6DSO") Signed-off-by: Silvano Seva s.seva@4sigma.it Acked-by: Lorenzo Bianconi lorenzo@kernel.org Link: https://patch.msgid.link/20250311085030.3593-4-s.seva@4sigma.it 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/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -604,6 +604,9 @@ int st_lsm6dsx_read_tagged_fifo(struct s if (!fifo_len) return 0;
+ if (!pattern_len) + pattern_len = ST_LSM6DSX_TAGGED_SAMPLE_SIZE; + for (read_len = 0; read_len < fifo_len; read_len += pattern_len) { err = st_lsm6dsx_read_block(hw, ST_LSM6DSX_REG_FIFO_OUT_TAG_ADDR,