PCI: mvebu: Check valid base address before port setup

This driver does not fail to probe when it cannot obtain
a port base address. Therefore, add a check for NULL base address
before setting up the port, which prevents a kernel panic in such
cases.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 424a7b8e040f6c3516587707af306dfa0f02776b..338691b616d9b6f2ffb0da543154b9abf2158bae 100644 (file)
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -662,6 +662,8 @@ static int __init mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
 
        for (i = 0; i < pcie->nports; i++) {
                struct mvebu_pcie_port *port = &pcie->ports[i];
+               if (!port->base)
+                       continue;
                mvebu_pcie_setup_hw(port);
        }