Index: linux_for_test/drivers/pci/probe.c
===================================================================
--- linux_for_test.orig/drivers/pci/probe.c	2016-05-09 21:55:25.419688131 +0800
+++ linux_for_test/drivers/pci/probe.c	2016-05-18 23:29:13.650362034 +0800
@@ -1596,6 +1596,15 @@
 }
 EXPORT_SYMBOL(pci_bus_read_dev_vendor_id);
 
+static int blacklist_pci;
+static int __init parse_blacklist_pci(char *str)
+{
+	get_option(&str, &blacklist_pci);
+	printk("blacklist pci device, str:%s, result:%x\n",
+		str, blacklist_pci);
+	return 0;
+}
+early_param("blacklist_pci", parse_blacklist_pci);
 /*
  * Read the config data for a PCI device, sanity-check it
  * and fill in the dev structure...
@@ -1605,9 +1614,10 @@
 	struct pci_dev *dev;
 	u32 l;
 
-	if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000))
+	if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000)||
+		l == (u32)blacklist_pci)
 		return NULL;
-
+	printk("%s for device:%x\n", __FUNCTION__, l);
 	dev = pci_alloc_dev(bus);
 	if (!dev)
 		return NULL;