On Fri, Jan 2, 2015 at 2:32 PM, Devendra Naga <devendra.aaru@xxxxxxxxx> wrote:
> This patch adds the error handling for the value returned from
> ade7754_spi_read_reg_8. With this patch, the following randconfig
> warnings get fixed automatically.
>
> drivers/staging/iio/meter/ade7754.c:222:6: warning: ‘val’ may be used
> uninitialized in this function [-Wmaybe-uninitialized]
> drivers/staging/iio/meter/ade7754.c:368:6: warning: ‘val’ may be used
> uninitialized in this function [-Wmaybe-uninitialized]
>
> Signed-off-by: Devendra Naga <devendra.aaru@xxxxxxxxx>
> ---
>
> Hello,
>
> Please see if this is the error message you wanted.
>
> Build tested on next-20141231 with randconfig sent to iio ml,
> and with allmodconfig.
>
> drivers/staging/iio/meter/ade7754.c | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c
> index 81f6731..746b188 100644
> --- a/drivers/staging/iio/meter/ade7754.c
> +++ b/drivers/staging/iio/meter/ade7754.c
> @@ -216,9 +216,13 @@ error_ret:
>
> static int ade7754_reset(struct device *dev)
> {
> + int ret;
> u8 val;
>
> - ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
> + ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
> + if (ret < 0)
IMO,we should have consistent change throughout and here also we
should use dev_err in failure scenario.
> + return ret;
> +
> val |= 1 << 6; /* Software Chip Reset */
> return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
> }
> @@ -362,9 +366,16 @@ error_ret:
> /* Power down the device */
> static int ade7754_stop_device(struct device *dev)
> {
> + int ret;
> u8 val;
>
> - ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
> + ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
> + if (ret < 0) {
> + dev_err(dev, "unable to power down the device, error: %d",
> + ret);
> + return ret;
> + }
> +
> val |= 7 << 3; /* ADE7754 powered down */
> return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
> }
> --
> 1.9.3
>
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