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RE: [PATCH v2 1/6] rtw88: use macro to check the current band

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From: Brian Norris 

> On Wed, Oct 16, 2019 at 5:33 AM <yhchuang@xxxxxxxxxxx> wrote:
> > index 4759d6a0ca6e..492a2bfc0d5a 100644
> > --- a/drivers/net/wireless/realtek/rtw88/main.h
> > +++ b/drivers/net/wireless/realtek/rtw88/main.h
> > @@ -58,6 +58,19 @@ struct rtw_hci {
> >         u8 bulkout_num;
> >  };
> >
> > +#define IS_CH_5G_BAND_1(channel) ((channel) >= 36 && (channel <= 48))
> > +#define IS_CH_5G_BAND_2(channel) ((channel) >= 52 && (channel <= 64))
> > +#define IS_CH_5G_BAND_3(channel) ((channel) >= 100 && (channel <=
> 144))
> > +#define IS_CH_5G_BAND_4(channel) ((channel) >= 149 && (channel <=
> 177))
> 
> There are channels between 48 and 52, 64 and 100, and 144 and 149.
> What are you doing with those?

These devices are not supporting those channels you mentioned.
So I hope if some unsupported channels are used, they should hit the
"else" case, or throw such a warn.

> 
> > +#define IS_CH_5G_BAND_MID(channel) \
> > +       (IS_CH_5G_BAND_2(channel) || IS_CH_5G_BAND_3(channel))
> > +
> > +#define IS_CH_2G_BAND(channel) ((channel) <= 14)
> > +#define IS_CH_5G_BAND(channel) \
> > +       (IS_CH_5G_BAND_1(channel) || IS_CH_5G_BAND_2(channel) || \
> > +        IS_CH_5G_BAND_3(channel) || IS_CH_5G_BAND_4(channel))
> 
> Given the above (you have major holes in 5G_BAND{1,2,3,4}), this macro
> seems like a regression.
> 

Yan-Hsuan




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