On Fri, Jan 03, 2025 at 09:55:40AM +0100, Stanislaw Gruszka wrote:
> On Sat, Dec 21, 2024 at 01:39:32PM +0100, Ariel Otilibili wrote:
> > Coverity-ID: 1525307
> > Signed-off-by: Ariel Otilibili <ariel.otilibili-anieli@xxxxxxxxxx>
> > ---
> > drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 6 ------
> > 1 file changed, 6 deletions(-)
> >
> > diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > index 60c2a12e9d5e..e5f553a1ea24 100644
> > --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > @@ -8882,13 +8882,10 @@ static void rt2800_rxiq_calibration(struct rt2x00_dev *rt2x00dev)
> >
> > for (ch_idx = 0; ch_idx < 2; ch_idx = ch_idx + 1) {
> > if (ch_idx == 0) {
> > - rfval = rfb0r1 & (~0x3);
> > rfval = rfb0r1 | 0x1;
>
> I wonder if intention here was different, for example:
>
> rfval = rfb0r1 & (~0x3);
> rfval = rfval | 0x1;
>
> For me the patch looks ok - it does not change existing behaviour,
> since rfval is overwritten by second line anyway.
I agree with the likely intention here, however, the vendor driver
also comes with the dead code, see
https://github.com/lixuande/rt2860v2/blob/master/files/rt2860v2/common/cmm_rf_cal.c#L2690
So this is certainly a bug in the vendor driver as well which got ported
bug-by-bug to rt2x00... Not sure what is the best thing to do in this
case.
>
> Acked-by: Stanislaw Gruszka <stf_xl@xxxxx>
>
> But Tomislav and Daniel, please check if this code is correct.
>
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, rfval);
> > - rfval = rfb0r2 & (~0x33);
> > rfval = rfb0r2 | 0x11;
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfval);
> > - rfval = rfb0r42 & (~0x50);
> > rfval = rfb0r42 | 0x10;
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 42, rfval);
> >
> > @@ -8901,13 +8898,10 @@ static void rt2800_rxiq_calibration(struct rt2x00_dev *rt2x00dev)
> >
> > rt2800_bbp_dcoc_write(rt2x00dev, 1, 0x00);
> > } else {
> > - rfval = rfb0r1 & (~0x3);
> > rfval = rfb0r1 | 0x2;
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, rfval);
> > - rfval = rfb0r2 & (~0x33);
> > rfval = rfb0r2 | 0x22;
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfval);
> > - rfval = rfb0r42 & (~0x50);
> > rfval = rfb0r42 | 0x40;
> > rt2800_rfcsr_write_bank(rt2x00dev, 0, 42, rfval);
> >
> > --
> > 2.47.1
> >
>
