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PCI: Fix NULL pointer dereference in of_pci_bus_find_domain_nr() 

If the "parent" pointer passed to of_pci_bus_find_domain_nr() is NULL,
don't dereference it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Shawn Lin 2018-03-01 09:26:55 +08:00 committed by Bjorn Helgaas
parent 7babfa5b4b
commit 9df1c6ecbf
1 changed files with 3 additions and 2 deletions
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5
drivers/pci/pci.c
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@ -5611,8 +5611,9 @@ static int of_pci_bus_find_domain_nr(struct device *parent)
use_dt_domains = 0;
domain = pci_get_new_domain_nr();
} else {
dev_err(parent, "Node %pOF has inconsistent \"linux,pci-domain\" property in DT\n",
parent->of_node);
if (parent)
pr_err("Node %pOF has ", parent->of_node);
pr_err("Inconsistent \"linux,pci-domain\" property in DT\n");
domain = -1;
}