On 8/10/07, Pavel Emelyanov <[email protected]> wrote:
> The platform_uevent() callback called via
> show_uevent()
> dev_uevent()
> platform_uevent()
> forgot to set NULL to the last envp pointer and this caused the
> show_uevent() oops while printing all the envp pointers like this:
> The last hunk in this patch fixes this.
Looks like the right fix, yes.
> The other problem is that the envp passed to bus, type and platform callbacks
> from dev_uevent() is the same, so the callbacks can overwrite the info, written
> by the others. Did I miss something important?
Sounds like a bug, yes.
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.
Thanks,
Kay
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