Commit dc3782a3 authored Jan 22, 2018 by Jaehoon Chung Committed by Greg Kroah-Hartman Jul 22, 2018

PCI: exynos: Fix a potential init_clk_resources NULL pointer dereference



commit b5d6bc90c9129279d363ccbc02ad11e7b657c0b4 upstream.

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 <jh80.chung@samsung.com>
[lorenzo.pieralisi@arm.com: rewrote the commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent b1c3ce0c

drivers/pci/dwc/pci-exynos.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -695,7 +695,8 @@ 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;