It works with the high symbol rate transponders. Tested-by: Nibble Max <nibble....@gmail.com>
>Maximum satellite symbol rate used is 45000000Sps which overflows >when multiplied by 135. As final calculation result is fraction, >we could use mult_frac macro in order to keep calculation inside >32 bit number limits and prevent overflow. > >Original bug and fix was provided by Nibble Max. I decided to >implement it differently as it is now. > >Reported-by: Nibble Max <nibble....@gmail.com> >Cc: <sta...@kernel.org> >Signed-off-by: Antti Palosaari <cr...@iki.fi> >--- > drivers/media/tuners/m88ts2022.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >diff --git a/drivers/media/tuners/m88ts2022.c >b/drivers/media/tuners/m88ts2022.c >index 40c42de..7a62097 100644 >--- a/drivers/media/tuners/m88ts2022.c >+++ b/drivers/media/tuners/m88ts2022.c >@@ -314,7 +314,7 @@ static int m88ts2022_set_params(struct dvb_frontend *fe) > div_min = gdiv28 * 78 / 100; > div_max = clamp_val(div_max, 0U, 63U); > >- f_3db_hz = c->symbol_rate * 135UL / 200UL; >+ f_3db_hz = mult_frac(c->symbol_rate, 135, 200); > f_3db_hz += 2000000U + (frequency_offset_khz * 1000U); > f_3db_hz = clamp(f_3db_hz, 7000000U, 40000000U); > >-- >http://palosaari.fi/ >
<<attachment: nibble.max(1).vcf>>
