Am 19.07.2017 11:51, schrieb Dan Carpenter:
> We had intended to do the mask first and then the shift. Shift has
> higher precedence so we need to add parenthesis.
>
> Fixes: 874bcba65f9a ("staging: pi433: New driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
> index e391ce777bc7..5089449bf775 100644
> --- a/drivers/staging/pi433/rf69.c
> +++ b/drivers/staging/pi433/rf69.c
> @@ -387,7 +387,7 @@ enum lnaGain rf69_get_lna_gain(struct spi_device *spi)
>
> currentValue = READ_REG(REG_LNA);
is currentValue used again later ?
iff not (IMHO) it would be more readable to use
currentValue &= MASK_LNA_CURRENT_GAIN
here.
and
currentValue >>3
inside the switch()
>
> - switch (currentValue & MASK_LNA_CURRENT_GAIN >> 3) // improvement: change 3 to define
> + switch ((currentValue & MASK_LNA_CURRENT_GAIN) >> 3) // improvement: change 3 to define
> {
> case LNA_GAIN_AUTO: return automatic;
> case LNA_GAIN_MAX: return max;
note:
and instead to add an artificial define for 3, it would be simpler to change the LNA_GAIN_AUTO/MAX
to the "real" values and drop the >>3 for good.
just my 2 cents,
re,
wh
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