Re: [PATCH] Fix OOPS in show_uevent()

[Pavel Emelyanov]

Cornelia Huck wrote:
> On Fri, 10 Aug 2007 14:23:56 +0200,
> "Kay Sievers" <kay.sievers@xxxxxxxx> wrote:
>
> > But we still don't update the remaining buffer size and the remaining
> > array fields which are left after the call. Shouldn't we instead just
> > change the:
> >    int (*dev_uevent)(struct device *dev,
> >                                 char **envp, int num_envp,
> >                                 char *buffer, int buffer_size);
> > to:
> >   int (*dev_uevent)(struct device *dev,
> >                                char **envp, int num_envp, int *cur_index,
> >                                char *buffer, int buffer_size, int *cur_len);
> >
> > like we do for:
> >   int add_uevent_var(char **envp, int num_envp, int *cur_index,
> >                                   char *buffer, int buffer_size, int *cur_len,
> >                                   const char *format, ...)
> >
> > and along with the change of the callers, we would update the values
> > properly, so the next call has the correct numbers? There are 6
> > classes and something like 12 buses using this method, so it shouldn't
> > be too much trouble.

isn't it better to change
   int (*dev_uevent)(struct device *dev,
                                char **envp, int num_envp,
                                char *buffer, int buffer_size);
to
   int (*dev_uevent)(struct device *dev,
                                char **envp, int num_envp,
                                char **buffer);
and alter the buffer pointer inside?


> Sounds like a sensible approach. We may want the remaining non-users to
> add_uevent_var() at the same time, I guess.

Thanks,
Pavel
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