From mboxrd@z Thu Jan 1 00:00:00 1970 From: sboyd@codeaurora.org (Stephen Boyd) Date: Thu, 6 Mar 2014 22:44:41 -0800 Subject: [PATCH 2/7] pinctrl: msm: Check for ngpios > MAX_NR_GPIO In-Reply-To: <1394174686-8358-1-git-send-email-sboyd@codeaurora.org> References: <1394174686-8358-1-git-send-email-sboyd@codeaurora.org> Message-ID: <1394174686-8358-3-git-send-email-sboyd@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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. Cc: Bjorn Andersson Signed-off-by: Stephen Boyd --- 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 ac7223dab4a3..19b0de89dc07 100644 --- a/drivers/pinctrl/pinctrl-msm.c +++ b/drivers/pinctrl/pinctrl-msm.c @@ -882,10 +882,14 @@ 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; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation