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Commit 4db7d923 authored by Silvano Seva's avatar Silvano Seva Committed by Greg Kroah-Hartman
Browse files

iio: imu: st_lsm6dsx: fix possible lockup in st_lsm6dsx_read_tagged_fifo 



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: 801a6e0a ("iio: imu: st_lsm6dsx: add support to LSM6DSO")
Signed-off-by: default avatarSilvano Seva <s.seva@4sigma.it>
Acked-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250311085030.3593-4-s.seva@4sigma.it


Cc: <Stable@vger.kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f06a1a19

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c

+3 −0
Original line number Diff line number Diff line
@@ -541,6 +541,9 @@ int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw) 
	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,