UBUNTU: SAUCE: Bluetooth: decrease refcount after use

BugLink: https://launchpad.net/bugs/1641569

pci_get_subsys() will increase pci device refcount if it finds a
match. Explicitly decrease refcount if a device is found.
Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

drivers/bluetooth/btusb.c

@@ -2975,9 +2975,13 @@ static int btusb_probe(struct usb_interface *intf,
 	}
 
 	if (id->driver_info & BTUSB_MARVELL) {
+		struct pci_dev *pdev;
 		hdev->set_bdaddr = btusb_set_bdaddr_marvell;
-		if (pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, 0x1028, 0x0720, NULL) ||
-			pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, 0x1028, 0x0733, NULL)) {
+		pdev = pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, 0x1028, 0x0720, NULL);
+		if (!pdev)
+			pdev = pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, 0x1028, 0x0733, NULL);
+		if (pdev) {
+			pci_dev_put(pdev);
 			hdev->post_open = btusb_edge_post_open;
 			hdev->shutdown = btusb_edge_shutdown;
 		}