pegasus: add blacklist support to fix Belkin bluetooth dongle.

Reference: https://launchpad.net/bugs/140511

The Belkin bluetooth dongle unfortunately shares the vendor and device id
with the network adapter which causes lockups whenever the bluetooth
dongle is inserted.

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Ben Collins <ben.collins@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index b588c890ea7..a84ba487c71 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -1285,6 +1285,21 @@ static void check_carrier(struct work_struct *work)
         }
 }
 
+static int pegasus_blacklisted(struct usb_device *udev)
+{
+        struct usb_device_descriptor *udd = &udev->descriptor;
+
+        /* Special quirk to keep the driver from handling the Belkin Bluetooth
+         * dongle which happens to have the same ID.
+         */
+        if ((udd->idVendor == VENDOR_BELKIN && udd->idProduct == 0x0121) &&
+            (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
+            (udd->bDeviceProtocol == 1))
+                return 1;
+
+        return 0;
+}
+
 static int pegasus_probe(struct usb_interface *intf,
                          const struct usb_device_id *id)
 {
@@ -1296,6 +1311,12 @@ static int pegasus_probe(struct usb_interface *intf,
         DECLARE_MAC_BUF(mac);
 
         usb_get_dev(dev);
+
+        if (pegasus_blacklisted(dev)) {
+                res = -ENODEV;
+                goto out;
+        }
+
         net = alloc_etherdev(sizeof(struct pegasus));
         if (!net) {
                 dev_err(&intf->dev, "can't allocate %s\n", "device");