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PCI: exynos: Fix a potential init_clk_resources NULL pointer dereference

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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>
This commit is contained in:
Jaehoon Chung 2018-01-22 11:28:54 +09:00 committed by Lorenzo Pieralisi
parent 3b65ca50d2
commit b5d6bc90c9
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/dwc/pci-exynos.c
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@ -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;