Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [PATCH] staging: iio: ad7192: Use the dedicated reset function | From | Lars-Peter Clausen <> | Date | Thu, 14 Sep 2017 15:57:34 +0200 |
| |
On 09/14/2017 03:50 PM, Stefan Popa wrote: > 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 <stefan.popa@analog.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Thanks.
> --- > drivers/staging/iio/adc/ad7192.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c > index d11c6de..6150d27 100644 > --- a/drivers/staging/iio/adc/ad7192.c > +++ b/drivers/staging/iio/adc/ad7192.c > @@ -223,11 +223,9 @@ static int ad7192_setup(struct ad7192_state *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 */ >
| ![\](/images/icornerr.gif) |