RE: [PATCH] pinctrl: pin configuration states

From: Stephen Warren
Date: Thu Feb 02 2012 - 13:43:19 EST

Linus Walleij wrote at Wednesday, February 01, 2012 12:29 PM:
> On Thu, Jan 19, 2012 at 8:03 PM, Stephen Warren <swarren@xxxxxxxxxx> wrote:
> >> +     /*
> >> +      * Make a copy of the config state array - string pointers will end up
> > ...
> >> +     pinconf_states = tmp;
> >> +     pinconf_states_num += num_states;
> >
> > We need to allow multiple tables to be registered, for all the same
> > reasons we do for the pinmux mapping table. This implementation only
> > keeps the most recently registered table.
> ? beats me.
> Please check the code for how I realloc the tmp variable (in the v2
> patch set), I cannot spot the problem. It was designed to allow exactly
> multiple calls to add tables piece by piece.

Sorry, I must have been asleep when I wrote that...

I was expecting the implementation to copy each table separately and
store them in a list (since this would allow easy dynamic removel of the
entries too), hence when I saw the assignment to a single global, I
assumed it was just over-writing it; I guess I didn't even look at the
realloc above or noticed that it was assigning "tmp" not just the caller-
supplied parameter:-(


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