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    Subject[PATCH 5.10 060/103] iio: ssp_sensors: fix error code in ssp_print_mcu_debug()
    Date
    From: Dan Carpenter <dan.carpenter@oracle.com>

    commit 4170d3dd1467e9d78cb9af374b19357dc324b328 upstream.

    The ssp_print_mcu_debug() function should return negative error codes on
    error. Returning "length" is meaningless. This change does not affect
    runtime because the callers only care about zero/non-zero.

    Reported-by: Jonathan Cameron <jic23@kernel.org>
    Fixes: 50dd64d57eee ("iio: common: ssp_sensors: Add sensorhub driver")
    Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
    Link: https://lore.kernel.org/r/20210914105333.GA11657@kili
    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/common/ssp_sensors/ssp_spi.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/iio/common/ssp_sensors/ssp_spi.c
    +++ b/drivers/iio/common/ssp_sensors/ssp_spi.c
    @@ -137,7 +137,7 @@ static int ssp_print_mcu_debug(char *dat
    if (length > received_len - *data_index || length <= 0) {
    ssp_dbg("[SSP]: MSG From MCU-invalid debug length(%d/%d)\n",
    length, received_len);
    - return length ? length : -EPROTO;
    + return -EPROTO;
    }

    ssp_dbg("[SSP]: MSG From MCU - %s\n", &data_frame[*data_index]);

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