4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
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@xxxxxxxxxxx>
[lorenzo.pieralisi@xxxxxxx: rewrote the commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/dwc/pci-exynos.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/pci/dwc/pci-exynos.c
+++ b/drivers/pci/dwc/pci-exynos.c
@@ -695,7 +695,8 @@ static int __init exynos_pcie_probe(stru
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;
