[SERIAL] Fix oops when removing some PCI serial boards

Patch from William Lee Irwin II.

diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index b0a48e9717df35e119fe5d7d6382563fde2111ce..0ec02685e0788767a49b6adb8d4b9e9b6dfdb604 100644 (file)
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -768,7 +768,8 @@ static void __devexit pci_remove_one(struct pci_dev *dev)
                for (i = 0; i < priv->nr; i++)
                        unregister_serial(priv->line[i]);
 
-               priv->board->init_fn(dev, priv->board, 0);
+               if (priv->board->init_fn)
+                       priv->board->init_fn(dev, priv->board, 0);
 
                pci_disable_device(dev);