On Thu, Jun 11, 2015 at 07:22:44PM +0800, Fu Wei wrote:
> Hi Guenter,
>
[ ... ]
>
> > value we are trying to set. Effectively the above accepts every pretimeout
> > if wdd->pretimeout is 0. It also accepts every pretimeout if
> > max_pretimeout == 0, even if wdd->timeout is set and t >= wdd->timeout.
> >
> > Try
> >
> > return (wdd->max_pretimeout && (t < wdd->min_pretimeout ||
> > t > wdd->max_pretimeout)) ||
> > (wdd->timeout && t >= wdd->timeout);
> >
> >> }
>
> /*
> * Use the following function to check if a pretimeout value is invalid.
> * It can be "0", that means we don't use pretimeout.
> * This function returns 0, when pretimeout is 0.
returns false if pretimeout is 0.
> */
> static inline bool watchdog_pretimeout_invalid(struct watchdog_device *wdd,
> unsigned int t)
> {
> return t && (wdd->max_pretimeout &&
> (t < wdd->min_pretimeout || t > wdd->max_pretimeout)) ||
> (wdd->timeout && t >= wdd->timeout);
> }
>
Makes sense. Be careful with (), though. This evaluates to
return t && (...) || (wdd->timeout && t >= wdd->timeout);
but it should probably be
return t && ((...) || (wdd->timeout && t >= wdd->timeout));
That doesn't make a difference in practice (if t == 0, it is never >= timeout
if timeout is > 0), but it would be a bit cleaner.
>
> >>
> >> /* Use the following functions to manipulate watchdog driver specific
> >> data */
> >> @@ -132,11 +153,20 @@ static inline void *watchdog_get_drvdata(struct
> >> watchdog_device *wdd)
> >> }
> >>
> >> /* drivers/watchdog/watchdog_core.c */
> >> -extern int watchdog_init_timeout(struct watchdog_device *wdd,
> >> - unsigned int timeout_parm, struct device
> >> *dev);
> >> +int watchdog_init_timeouts(struct watchdog_device *wdd,
> >> + unsigned int pretimeout_parm,
> >> + unsigned int timeout_parm,
> >> + struct device *dev);
> >
> >
> > Please align continuation lines with '('.
>
> Fixed , thanks
>
> >
> >
> >> extern int watchdog_register_device(struct watchdog_device *);
> >> extern void watchdog_unregister_device(struct watchdog_device *);
> >>
> >> +static inline int watchdog_init_timeout(struct watchdog_device *wdd,
> >> + unsigned int timeout_parm,
> >> + struct device *dev)
> >> +{
> >> + return watchdog_init_timeouts(wdd, 0, timeout_parm, dev);
> >> +}
> >> +
> >> #ifdef CONFIG_HARDLOCKUP_DETECTOR
> >> void watchdog_nmi_disable_all(void);
> >> void watchdog_nmi_enable_all(void);
> >>
> >
>
>
>
> --
> Best regards,
>
> Fu Wei
> Software Engineer
> Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
> Ph: +86 21 61221326(direct)
> Ph: +86 186 2020 4684 (mobile)
> Room 1512, Regus One Corporate Avenue,Level 15,
> One Corporate Avenue,222 Hubin Road,Huangpu District,
> Shanghai,China 200021
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