Re: [PATCH] mt76x0: phy: fix restore phase in mt76x0_phy_recalibrate_after_assoc

[Stanislaw Gruszka <sgruszka@redhat.com>]

On Mon, Oct 08, 2018 at 08:11:45PM +0200, Felix Fietkau wrote:
> On 2018-10-08 14:40, Lorenzo Bianconi wrote:
> > Fix restore value configured in 0x2124 register in
> > mt76x0_phy_recalibrate_after_assoc routine.
> > 
> > Fixes: 10de7a8b4ab9 ("mt76x0: phy files")
> > Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
> > ---
> >  drivers/net/wireless/mediatek/mt76/mt76x0/phy.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
> > index 99e0a91a2f99..d18942e54048 100644
> > --- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
> > +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
> > @@ -734,8 +734,7 @@ void mt76x0_phy_recalibrate_after_assoc(struct mt76x02_dev *dev)
> >  	usleep_range(500, 700);
> >  
> >  	reg_val = mt76_rr(dev, 0x2124);
> > -	reg_val &= 0xffffff7e;
> > -	mt76_wr(dev, 0x2124, reg_val);
> > +	mt76_wr(dev, 0x2124, 0xffffff7e);
> I'm pretty sure you can drop the mt76_rr as well. Also, you can refer to
> 0x2124 as MT_BBP(IBI, 9).

I think is needed we do:

	reg_val = mt76_rr(dev, 0x2124); 
	mt76_wr(dev, 0x2124, 0xffffff7e);

	CALIBRATE

	mt76_wr(dev, 0x2124, reg_val);

so seems we have to restore orginal value after calibration.

Referencing as MT_BBP(IBI, 9) is obviously fine.

Thanks
Stanislaw