On Fri, 3 May 2024 at 16:08, Dragan Simic <dsimic@xxxxxxxxxxx> wrote: > > Hello Ricardo, > > On 2024-05-03 13:56, Ricardo Ribalda wrote: > > I am trying to get the DS, but > > https://www.nxp.com/acrobat_download/literature/9397/75015931.pdf is a > > dead links now. > > > > Anyone have access to the datasheet? > > It's kind of available on the link below, but for some strange reason > the download fails after downloading the first 128 KB or so. > > https://web.archive.org/web/20080907185532/https://www.nxp.com/acrobat_download/literature/9397/75015931.pdf\ Mike, by any chance do you have a copy of the DS? > > > > On Fri, 3 May 2024 at 13:55, Dan Carpenter <dan.carpenter@xxxxxxxxxx> > > wrote: > >> > >> On Fri, May 03, 2024 at 11:27:58AM +0100, Mauro Carvalho Chehab wrote: > >> > Em Mon, 29 Apr 2024 15:05:05 +0000 > >> > Ricardo Ribalda <ribalda@xxxxxxxxxxxx> escreveu: > >> > > >> > > We do not expect the sample_freq to be over 613MHz. > >> > > > >> > > Found by cocci: > >> > > drivers/media/dvb-frontends/tda10048.c:345:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead. > >> > > > >> > > Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> > >> > > --- > >> > > drivers/media/dvb-frontends/tda10048.c | 4 +++- > >> > > 1 file changed, 3 insertions(+), 1 deletion(-) > >> > > > >> > > diff --git a/drivers/media/dvb-frontends/tda10048.c b/drivers/media/dvb-frontends/tda10048.c > >> > > index 3e725cdcc66b..1886f733dbbf 100644 > >> > > --- a/drivers/media/dvb-frontends/tda10048.c > >> > > +++ b/drivers/media/dvb-frontends/tda10048.c > >> > > @@ -328,7 +328,8 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz, > >> > > u32 bw) > >> > > { > >> > > struct tda10048_state *state = fe->demodulator_priv; > >> > > - u64 t, z; > >> > > + u32 z; > >> > > + u64 t; > >> > > > >> > > dprintk(1, "%s()\n", __func__); > >> > > > >> > > @@ -341,6 +342,7 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz, > >> > > /* t *= 2147483648 on 32bit platforms */ > >> > > t *= (2048 * 1024); > >> > > t *= 1024; > >> > > + /* Sample frequency is under 613MHz */ > >> > > >> > Are you sure about that? Some DVB devices have very high frequency > >> > clocks, specially if they're also used for satellite, so I can't > >> > be sure by just looking at the driver's code. > >> > > >> > Also, we had already a bunch of regressions with "fixes" like this > >> > that actually broke frontend drivers. > >> > >> This patch preserves the existing behavior. The sample_freq_hz > >> variable > >> is a u32 so, in the original code, z couldn't have been more than > >> U32_MAX even though it was declared as a u64. I agree with Dan, we keep the existing behaviour. So it wont hurt to merge the code... All that said, if someone has access to the DS, I do not mind reviewing it. > >> > >> It's possible that the original code was wrong. We have seen that in > >> other places in this patchset. Adding a note about the datasheet is > >> also a good idea. > >> > >> regards, > >> dan carpenter > >> -- Ricardo Ribalda
