[media] af9015: reject device TerraTec Cinergy T Stick Dual RC (rev. 2)

That same USB ID is used both AF9015 and AF9035 driver.
iManufacturer is only thing we can select correct driver without a I/O.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 39 insertions, 1 deletions

diff --git a/drivers/media/usb/dvb-usb-v2/af9015.c b/drivers/media/usb/dvb-usb-v2/af9015.c
index 2fa7c6ee5a70..d556042cf312 100644
--- a/drivers/media/usb/dvb-usb-v2/af9015.c
+++ b/drivers/media/usb/dvb-usb-v2/af9015.c
@@ -1320,6 +1320,43 @@ static int af9015_get_rc_config(struct dvb_usb_device *d, struct dvb_usb_rc *rc)
         #define af9015_get_rc_config NULL
 #endif
 
+static int af9015_probe(struct usb_interface *intf,
+                const struct usb_device_id *id)
+{
+        struct usb_device *udev = interface_to_usbdev(intf);
+        char manufacturer[sizeof("ITE Technologies, Inc.")];
+
+        memset(manufacturer, 0, sizeof(manufacturer));
+        usb_string(udev, udev->descriptor.iManufacturer,
+                        manufacturer, sizeof(manufacturer));
+        /*
+         * There is two devices having same ID but different chipset. One uses
+         * AF9015 and the other IT9135 chipset. Only difference seen on lsusb
+         * is iManufacturer string.
+         *
+         * idVendor           0x0ccd TerraTec Electronic GmbH
+         * idProduct          0x0099
+         * bcdDevice            2.00
+         * iManufacturer           1 Afatech
+         * iProduct                2 DVB-T 2
+         *
+         * idVendor           0x0ccd TerraTec Electronic GmbH
+         * idProduct          0x0099
+         * bcdDevice            2.00
+         * iManufacturer           1 ITE Technologies, Inc.
+         * iProduct                2 DVB-T TV Stick
+         */
+        if ((le16_to_cpu(udev->descriptor.idVendor) == USB_VID_TERRATEC) &&
+                        (le16_to_cpu(udev->descriptor.idProduct) == 0x0099)) {
+                if (!strcmp("ITE Technologies, Inc.", manufacturer)) {
+                        dev_dbg(&udev->dev, "%s: rejecting device\n", __func__);
+                        return -ENODEV;
+                }
+        }
+
+        return dvb_usbv2_probe(intf, id);
+}
+
 /* interface 0 is used by DVB-T receiver and
    interface 1 is for remote controller (HID) */
 static struct dvb_usb_device_properties af9015_props = {
@@ -1428,6 +1465,7 @@ static const struct usb_device_id af9015_id_table[] = {
                 &af9015_props, "AverMedia AVerTV Volar M (A815Mac)", NULL) },
         { DVB_USB_DEVICE(USB_VID_TERRATEC, USB_PID_TERRATEC_CINERGY_T_STICK_RC,
                 &af9015_props, "TerraTec Cinergy T Stick RC", RC_MAP_TERRATEC_SLIM_2) },
+        /* XXX: that same ID [0ccd:0099] is used by af9035 driver too */
         { DVB_USB_DEVICE(USB_VID_TERRATEC, USB_PID_TERRATEC_CINERGY_T_STICK_DUAL_RC,
                 &af9015_props, "TerraTec Cinergy T Stick Dual RC", RC_MAP_TERRATEC_SLIM) },
         { DVB_USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_A850T,
@@ -1444,7 +1482,7 @@ MODULE_DEVICE_TABLE(usb, af9015_id_table);
 static struct usb_driver af9015_usb_driver = {
         .name = KBUILD_MODNAME,
         .id_table = af9015_id_table,
-        .probe = dvb_usbv2_probe,
+        .probe = af9015_probe,
         .disconnect = dvb_usbv2_disconnect,
         .suspend = dvb_usbv2_suspend,
         .resume = dvb_usbv2_resume,