cxgbev(4): verify the vendor id before claiming a device

PR:		299002
Reviewed by:	jhb
MFC after:	1 week
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D60203

sys/dev/cxgbe/t4_vf.c

@@ -160,9 +160,13 @@ static struct cdevsw t4vf_cdevsw = {
 static int
 t4vf_probe(device_t dev)
 {
-	uint16_t d;
+	uint16_t d, v;
 	size_t i;
 
+	v = pci_get_vendor(dev);
+	if (v != PCI_VENDOR_ID_CHELSIO)
+		return (ENXIO);
+
 	d = pci_get_device(dev);
 	for (i = 0; i < nitems(t4vf_pciids); i++) {
 		if (d == t4vf_pciids[i].device) {
@@ -176,9 +180,13 @@ t4vf_probe(device_t dev)
 static int
 t5vf_probe(device_t dev)
 {
-	uint16_t d;
+	uint16_t d, v;
 	size_t i;
 
+	v = pci_get_vendor(dev);
+	if (v != PCI_VENDOR_ID_CHELSIO)
+		return (ENXIO);
+
 	d = pci_get_device(dev);
 	for (i = 0; i < nitems(t5vf_pciids); i++) {
 		if (d == t5vf_pciids[i].device) {
@@ -192,9 +200,13 @@ t5vf_probe(device_t dev)
 static int
 t6vf_probe(device_t dev)
 {
-	uint16_t d;
+	uint16_t d, v;
 	size_t i;
 
+	v = pci_get_vendor(dev);
+	if (v != PCI_VENDOR_ID_CHELSIO)
+		return (ENXIO);
+
 	d = pci_get_device(dev);
 	for (i = 0; i < nitems(t6vf_pciids); i++) {
 		if (d == t6vf_pciids[i].device) {
@@ -208,9 +220,13 @@ t6vf_probe(device_t dev)
 static int
 chvf_probe(device_t dev)
 {
-	uint16_t d;
+	uint16_t d, v;
 	size_t i;
 
+	v = pci_get_vendor(dev);
+	if (v != PCI_VENDOR_ID_CHELSIO)
+		return (ENXIO);
+
 	d = pci_get_device(dev);
 	for (i = 0; i < nitems(t7vf_pciids); i++) {
 		if (d == t7vf_pciids[i].device) {