usb serial: support Alcor Micro Corp. USB 2.0 TO RS-232 through pl2303 driver

Patch to add support for Alcor Micro Corp. USB 2.0 TO RS-232 converter.
This patch adds VID and PID to pl2303.[ch], adds it to the "HORRIBLE
HACK FOR PL2303" in usb-serial.c and also prevents cdc-acm to claim
driving this device by blacklisting it in hid-core.

Signed-off-by: Johannes Steingraeber <Jo_Stein@web.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 8 insertions, 1 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 51caf8a61463..1036d436ed23 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -81,6 +81,7 @@ static struct usb_device_id id_table [] = {
         { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
         { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
         { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
+        { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
         { }                                     /* Terminating entry */
 };
 
diff --git a/drivers/usb/serial/pl2303.h b/drivers/usb/serial/pl2303.h
index 55195e76eb6f..762cc290ef58 100644
--- a/drivers/usb/serial/pl2303.h
+++ b/drivers/usb/serial/pl2303.h
@@ -89,3 +89,7 @@
 /* Belkin "F5U257" Serial Adapter */
 #define BELKIN_VENDOR_ID        0x050d
 #define BELKIN_PRODUCT_ID       0x0257
+
+/* Alcor Micro Corp. USB 2.0 TO RS-232 */
+#define ALCOR_VENDOR_ID         0x058F
+#define ALCOR_PRODUCT_ID        0x9720
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 03c619478a7c..0222d92842b8 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -712,7 +712,9 @@ int usb_serial_probe(struct usb_interface *interface,
         if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) &&
              (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) ||
             ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) &&
-             (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) {
+             (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) ||
+            ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) &&
+             (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) {
                 if (interface != dev->actconfig->interface[0]) {
                         /* check out the endpoints of the other interface*/
                         iface_desc = dev->actconfig->interface[0]->cur_altsetting;