From: Krzysztof Kozlowski Date: Sat, 13 May 2023 11:35:10 +0000 (+0200) Subject: pinctrl: qcom: sc8180x: gracefully handle missing IO memory resource X-Git-Tag: v6.6.7~2485^2~44 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=070a10d6fe1b2f4cc5d6c38b478cc059461eabe9;p=platform%2Fkernel%2Flinux-starfive.git pinctrl: qcom: sc8180x: gracefully handle missing IO memory resource If device was probed with incorrect DT or ACPI tables, the IO memory resource would be missing and driver would derefernce NULL pointer in sc8180x_pinctrl_add_tile_resources(). Add simplep check if IO memory resource was provided to silence Smatch warning: drivers/pinctrl/qcom/pinctrl-sc8180x.c:1664 sc8180x_pinctrl_add_tile_resources() error: potentially dereferencing uninitialized 'mres'. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Bjorn Andersson Link: https://lore.kernel.org/r/20230513113510.177666-1-krzysztof.kozlowski@linaro.org Signed-off-by: Linus Walleij --- diff --git a/drivers/pinctrl/qcom/pinctrl-sc8180x.c b/drivers/pinctrl/qcom/pinctrl-sc8180x.c index f86b176..d6a79ad 100644 --- a/drivers/pinctrl/qcom/pinctrl-sc8180x.c +++ b/drivers/pinctrl/qcom/pinctrl-sc8180x.c @@ -1622,7 +1622,8 @@ static const struct msm_pinctrl_soc_data sc8180x_acpi_pinctrl = { static int sc8180x_pinctrl_add_tile_resources(struct platform_device *pdev) { int nres_num = pdev->num_resources + ARRAY_SIZE(sc8180x_tiles) - 1; - struct resource *mres, *nres, *res; + struct resource *mres = NULL; + struct resource *nres, *res; int i, ret; /* @@ -1649,6 +1650,9 @@ static int sc8180x_pinctrl_add_tile_resources(struct platform_device *pdev) *res++ = *r; } + if (!mres) + return -EINVAL; + /* Append tile memory resources */ for (i = 0; i < ARRAY_SIZE(sc8180x_tiles); i++, res++) { const struct tile_info *info = &sc8180x_tile_info[i];