4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Stefan Popa <[email protected]> commit f790923f146140a261ad211e5baf75d169f16fb2 upstream. Depends on: 691c4b95d1 ("iio: ad_sigma_delta: Implement a dedicated reset function") SPI host drivers can use DMA to transfer data, so the buffer should be properly allocated. Keeping it on the stack could cause an undefined behavior. The dedicated reset function solves this issue. Signed-off-by: Stefan Popa <[email protected]> Acked-by: Lars-Peter Clausen <[email protected]> Acked-by: Michael Hennerich <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/staging/iio/adc/ad7192.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -205,11 +205,9 @@ static int ad7192_setup(struct ad7192_st struct iio_dev *indio_dev = spi_get_drvdata(st->sd.spi); unsigned long long scale_uv; int i, ret, id; - u8 ones[6]; /* reset the serial interface */ - memset(&ones, 0xFF, 6); - ret = spi_write(st->sd.spi, &ones, 6); + ret = ad_sd_reset(&st->sd, 48); if (ret < 0) goto out; usleep_range(500, 1000); /* Wait for at least 500us */
