diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch b/target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch new file mode 100644 index 0000000000..c2b7487540 --- /dev/null +++ b/target/linux/ipq806x/patches/0027-pinctrl-msm-Check-for-ngpios-MAX_NR_GPIO.patch @@ -0,0 +1,39 @@ +From 8341db7b05b688e8e5a93acd0e80b40be409d037 Mon Sep 17 00:00:00 2001 +From: Stephen Boyd <sboyd@codeaurora.org> +Date: Thu, 6 Mar 2014 22:44:41 -0800 +Subject: [PATCH 027/182] pinctrl: msm: Check for ngpios > MAX_NR_GPIO + +Fail the probe and print a warning if SoC specific drivers have +more GPIOs than there can be accounted for in the static bitmaps. +This should avoid silent corruption/failures in the future. + +Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> +Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +--- + drivers/pinctrl/pinctrl-msm.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/drivers/pinctrl/pinctrl-msm.c b/drivers/pinctrl/pinctrl-msm.c +index e61b30a..90ac995 100644 +--- a/drivers/pinctrl/pinctrl-msm.c ++++ b/drivers/pinctrl/pinctrl-msm.c +@@ -870,10 +870,14 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl) + int ret; + int i; + int r; ++ unsigned ngpio = pctrl->soc->ngpios; ++ ++ if (WARN_ON(ngpio > MAX_NR_GPIO)) ++ return -EINVAL; + + chip = &pctrl->chip; + chip->base = 0; +- chip->ngpio = pctrl->soc->ngpios; ++ chip->ngpio = ngpio; + chip->label = dev_name(pctrl->dev); + chip->dev = pctrl->dev; + chip->owner = THIS_MODULE; +-- +1.7.10.4 + |