Em Thu, 14 Dec 2017 22:55:02 +0100
Ralph Metzler <rjkm@xxxxxxxxxxxxxx> escreveu:
> Hello Dan Carpenter,
>
> Dan Carpenter writes:
> > Hello Ralph Metzler,
> >
> > The patch 126f1e618870: "drx: add initial drx-d driver" from Mar 12,
> > 2011, leads to the following static checker warning:
> >
> > drivers/media/dvb-frontends/drxd_hard.c:1305 SC_WaitForReady()
> > info: return a literal instead of 'status'
> >
> > drivers/media/dvb-frontends/drxd_hard.c
> > 1298 static int SC_WaitForReady(struct drxd_state *state)
> > 1299 {
> > 1300 int i;
> > 1301
> > 1302 for (i = 0; i < DRXD_MAX_RETRIES; i += 1) {
> > 1303 int status = Read16(state, SC_RA_RAM_CMD__A, NULL, 0);
> > 1304 if (status == 0)
> > 1305 return status;
> > ^^^^^^^^^^^^^
> > The register is set to zero when ready? The answer should obviously be
> > yes, but it wouldn't totally surprise me if this function just always
> > looped 1000 times... Few of the callers check the return. Anyway, it's
> > more clear to just "return 0;"
> >
> > 1306 }
> > 1307 return -1;
> > ^^
> > -1 is not a proper error code.
> >
> > 1308 }
> >
> > regards,
> > dan carpenter
>
> I think I wrote the driver more than 10 years ago and somebody later submitted it
> to the kernel.
>
> I don't know if there is a anybody still maintaining this. Is it even used anymore?
> I could write a patch but cannot test it (e.g. to see if it really always
> loops 1000 times ...)
It seems that it is used on this board (besides ngene):
EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2
a. k. a.: Hauppauge WinTV HVR 900 (R2)
I might have a HVR-900 rev 2 somewhere, but if so, it is not at the
usual place. I moved a few times since when I touched at the
drxd driver, at the time it was merged upstream. Maybe Michael or
someone at Hauppauge could test a patch for it, if they still have
this device.
Thanks,
Mauro
