From: Jaehoon Chung Date: Mon, 22 Jan 2018 02:28:54 +0000 (+0900) Subject: PCI: exynos: Fix a potential init_clk_resources NULL pointer dereference X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b5d6bc90c9129279d363ccbc02ad11e7b657c0b4;p=openwrt%2Fstaging%2Fblogic.git PCI: exynos: Fix a potential init_clk_resources NULL pointer dereference In order to avoid triggering a NULL pointer dereference in exynos_pcie_probe() a check must be put in place to detect if the init_clk_resources hook is initialized before calling it. Add the respective function pointer check in exynos_pcie_probe(). Signed-off-by: Jaehoon Chung [lorenzo.pieralisi@arm.com: rewrote the commit log] Signed-off-by: Lorenzo Pieralisi --- diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c index 56f32aeebd0a..39f08881f9a4 100644 --- a/drivers/pci/dwc/pci-exynos.c +++ b/drivers/pci/dwc/pci-exynos.c @@ -499,7 +499,8 @@ static int __init exynos_pcie_probe(struct platform_device *pdev) return ret; } - if (ep->ops && ep->ops->get_clk_resources) { + if (ep->ops && ep->ops->get_clk_resources && + ep->ops->init_clk_resources) { ret = ep->ops->get_clk_resources(ep); if (ret) return ret;