target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch

   1 From 8341db7b05b688e8e5a93acd0e80b40be409d037 Mon Sep 17 00:00:00 2001
   2 From: Stephen Boyd <sboyd@codeaurora.org>
   3 Date: Thu, 6 Mar 2014 22:44:41 -0800
   4 Subject: [PATCH 027/182] pinctrl: msm: Check for ngpios > MAX_NR_GPIO
   5
   6 Fail the probe and print a warning if SoC specific drivers have
   7 more GPIOs than there can be accounted for in the static bitmaps.
   8 This should avoid silent corruption/failures in the future.
   9
  10 Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
  11 Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
  12 Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
  13 ---
  14  drivers/pinctrl/pinctrl-msm.c |    6 +++++-
  15  1 file changed, 5 insertions(+), 1 deletion(-)
  16
  17 diff --git a/drivers/pinctrl/pinctrl-msm.c b/drivers/pinctrl/pinctrl-msm.c
  18 index e61b30a..90ac995 100644
  19 --- a/drivers/pinctrl/pinctrl-msm.c
  20 +++ b/drivers/pinctrl/pinctrl-msm.c
  21 @@ -870,10 +870,14 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
  22         int ret;
  23         int i;
  24         int r;
  25 +       unsigned ngpio = pctrl->soc->ngpios;
  26 +
  27 +       if (WARN_ON(ngpio > MAX_NR_GPIO))
  28 +               return -EINVAL;
  29
  30         chip = &pctrl->chip;
  31         chip->base = 0;
  32 -       chip->ngpio = pctrl->soc->ngpios;
  33 +       chip->ngpio = ngpio;
  34         chip->label = dev_name(pctrl->dev);
  35         chip->dev = pctrl->dev;
  36         chip->owner = THIS_MODULE;
  37 --
  38 1.7.10.4
  39