* re: [media] si2165: Add demod driver for DVB-T only
@ 2014-08-01 15:23 Dan Carpenter
2014-08-02 12:37 ` Matthias Schwarzott
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2014-08-01 15:23 UTC (permalink / raw)
To: zzam; +Cc: Matthias Schwarzott, linux-media
Hello Matthias Schwarzott,
The patch 3e54a1697ace: "[media] si2165: Add demod driver for DVB-T
only" from Jul 22, 2014, leads to the following static checker
warning:
drivers/media/dvb-frontends/si2165.c:329 si2165_wait_init_done()
warn: signedness bug returning '(-22)'
drivers/media/dvb-frontends/si2165.c
315 static bool si2165_wait_init_done(struct si2165_state *state)
316 {
317 int ret = -EINVAL;
318 u8 val = 0;
319 int i;
320
321 for (i = 0; i < 3; ++i) {
322 si2165_readreg8(state, 0x0054, &val);
323 if (val == 0x01)
324 return 0;
This is the success path?
325 usleep_range(1000, 50000);
326 }
327 dev_err(&state->i2c->dev, "%s: init_done was not set\n",
328 KBUILD_MODNAME);
329 return ret;
-EINVAL becomes 1 when casted to bool.
330 }
regards,
dan carpenter
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [media] si2165: Add demod driver for DVB-T only
2014-08-01 15:23 [media] si2165: Add demod driver for DVB-T only Dan Carpenter
@ 2014-08-02 12:37 ` Matthias Schwarzott
0 siblings, 0 replies; 2+ messages in thread
From: Matthias Schwarzott @ 2014-08-02 12:37 UTC (permalink / raw)
To: Dan Carpenter; +Cc: linux-media
On 01.08.2014 17:23, Dan Carpenter wrote:
> Hello Matthias Schwarzott,
>
Hello Dan,
> The patch 3e54a1697ace: "[media] si2165: Add demod driver for DVB-T
> only" from Jul 22, 2014, leads to the following static checker
> warning:
>
> drivers/media/dvb-frontends/si2165.c:329 si2165_wait_init_done()
> warn: signedness bug returning '(-22)'
>
> drivers/media/dvb-frontends/si2165.c
> 315 static bool si2165_wait_init_done(struct si2165_state *state)
> 316 {
> 317 int ret = -EINVAL;
> 318 u8 val = 0;
> 319 int i;
> 320
> 321 for (i = 0; i < 3; ++i) {
> 322 si2165_readreg8(state, 0x0054, &val);
> 323 if (val == 0x01)
> 324 return 0;
>
> This is the success path?
yes it is.
>
> 325 usleep_range(1000, 50000);
> 326 }
> 327 dev_err(&state->i2c->dev, "%s: init_done was not set\n",
> 328 KBUILD_MODNAME);
> 329 return ret;
>
> -EINVAL becomes 1 when casted to bool.
I already noticed this and prepared a patch to change the return type to
int.
This will be sent the next days.
Regards
Matthias
^ permalink raw reply [flat|nested] 2+ messages in thread
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