On Fri, Dec 8, 2017 at 2:41 PM, Quentin Schulz
[off-list ref] wrote:

quoted

-     pctl->desc = &axp20x_data;
+     pctl->desc = (struct axp20x_pctrl_desc *)of_device_get_match_data(dev);
      pctl->regmap = axp20x->regmap;
      pctl->dev = &pdev->dev;

I am using pctl->desc before retrieving it, thus dereferencing from a
null pointer.

We just have to move
pctl->chip.ngpio                = pctl->desc->npins;
after
pctl->desc = (struct axp20x_pctrl_desc *)of_device_get_match_data(dev);

Linus, I guess that I should send a patch to fix this or is there an
other way not to have to apply such a small and dumb patch?

Just send a patch based on my pin control tree "devel" branch or
linux-next, it's cool.

Things like this happens all the time.

Yours,
Linus Walleij