queue-4.19/iio-dac-ds4422-ds4424-fix-chip-verification.patch

   1 From 60f2208699ec08ff9fdf1f97639a661a92a18f1c Mon Sep 17 00:00:00 2001
   2 From: Ruslan Babayev <ruslan@babayev.com>
   3 Date: Sun, 5 May 2019 12:24:37 -0700
   4 Subject: iio: dac: ds4422/ds4424 fix chip verification
   5
   6 From: Ruslan Babayev <ruslan@babayev.com>
   7
   8 commit 60f2208699ec08ff9fdf1f97639a661a92a18f1c upstream.
   9
  10 The ds4424_get_value function takes channel number as it's 3rd
  11 argument and translates it internally into I2C address using
  12 DS4424_DAC_ADDR macro. The caller ds4424_verify_chip was passing an
  13 already translated I2C address as its last argument.
  14
  15 Signed-off-by: Ruslan Babayev <ruslan@babayev.com>
  16 Cc: xe-linux-external@cisco.com
  17 Cc: <Stable@vger.kernel.org>
  18 Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
  19 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  20
  21 ---
  22  drivers/iio/dac/ds4424.c |    2 +-
  23  1 file changed, 1 insertion(+), 1 deletion(-)
  24
  25 --- a/drivers/iio/dac/ds4424.c
  26 +++ b/drivers/iio/dac/ds4424.c
  27 @@ -166,7 +166,7 @@ static int ds4424_verify_chip(struct iio
  28  {
  29         int ret, val;
  30
  31 -       ret = ds4424_get_value(indio_dev, &val, DS4424_DAC_ADDR(0));
  32 +       ret = ds4424_get_value(indio_dev, &val, 0);
  33         if (ret < 0)
  34                 dev_err(&indio_dev->dev,
  35                                 "%s failed. ret: %d\n", __func__, ret);