On Wed, Dec 15, 2021 at 10:58 AM Fabien Dessenne
[off-list ref] wrote:

Consider the GPIO controller offset (from "gpio-ranges") to compute the
maximum GPIO line number.
This fixes an issue where gpio-ranges uses a non-null offset.
  e.g.: gpio-ranges = <&pinctrl 6 86 10>
        In that case the last valid GPIO line is not 9 but 15 (6 + 10 - 1)

Fixes: 67e2996f72c7 ("pinctrl: stm32: fix the reported number of GPIO lines per bank")
Reported-by: Christoph Fritz <redacted>
Signed-off-by: Fabien Dessenne <fabien.dessenne@foss.st.com>

Patch applied for fixes and tagged for stable.

Yours,
Linus Walleij