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pinctrl: single: fix pinctrl_spec.args_count bounds check

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The property #pinctrl-cells can either be 1 or 2:

- if #pinctrl-cells = <1>, then pinctrl_spec.args_count = 2
- if #pinctrl-cells = <2>, then pinctrl_spec.args_count = 3

All other values of pinctrl_spec.args_count are incorrect.  This fix
checks the upper bound instead of just the lower bound.

Fixes: a133954188 ("pinctrl: single: parse #pinctrl-cells = 2")
Reported-by: Trent Piepho <tpiepho@gmail.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/linux-omap/3139716.CMS8C0sQ7x@zen.local/
Link: https://lore.kernel.org/r/20200930174839.1308344-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Drew Fustini 2020-09-30 12:48:40 -05:00 committed by Linus Walleij
parent a0cec28c96
commit 9b9448f39e
1 changed files with 1 additions and 1 deletions
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2
drivers/pinctrl/pinctrl-single.c
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@ -1014,7 +1014,7 @@ static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs,
if (res)
return res;
if (pinctrl_spec.args_count < 2) {
if (pinctrl_spec.args_count < 2 || pinctrl_spec.args_count > 3) {
dev_err(pcs->dev, "invalid args_count for spec: %i\n",
pinctrl_spec.args_count);
break;