[PATCH] USB: plusb: Add support for PL-2501

[kyak <bas@bmail.ru>]

From: Mikhail Peselnik <peselnik@gmail.com>

This patch adds support for PL-2501 by adding the appropriate USB
ID's. This chip is used in several USB 'Easy Trasfer' Cables.

Signed-off-by: Mikhail Peselnik <peselnik@gmail.com>
Tested-by: Mikhail Peselnik <peselnik@gmail.com>
---
Now with proper sign-offs and right people in cc.
plusb driver (drivers/net/usb/plusb.c) doesn't recognize PL2501 chip.
Since PL2501 uses the same code as PL2301/PL2302 (PL2501 works in
compatibility mode with PL2301/PL2302), the fix is trivial and
attached as a patch.

Just to note: the patch is not mine, it can be found here and there on
Internet.
I've tested the patch and it works great.

Thank you.

--- linux-3.5/drivers/net/usb/plusb.c.orig      2012-07-22
21:06:41.905802795 +0400
+++ linux-3.5/drivers/net/usb/plusb.c   2012-07-22 21:07:00.345552404 +0400
@@ -107,7 +107,7 @@ static int pl_reset(struct usbnet *dev)
  }

  static const struct driver_info        prolific_info = {
-       .description =  "Prolific PL-2301/PL-2302/PL-25A1",
+       .description =  "Prolific PL-2301/PL-2302/PL-25A1/PL-2501",
         .flags =        FLAG_POINTTOPOINT | FLAG_NO_SETINT,
                 /* some PL-2302 versions seem to fail usb_set_interface() */
         .reset =        pl_reset,
@@ -139,6 +139,9 @@ static const struct usb_device_id   produc
  }, {
         USB_DEVICE(0x050d, 0x258a),     /* Belkin F5U258/F5U279 (PL-25A1) */
         .driver_info =  (unsigned long) &prolific_info,
+}, {
+       USB_DEVICE(0x067b, 0x2501),     /* PL-2501 */
+       .driver_info =  (unsigned long) &prolific_info,
  },

         { },            // END
@@ -158,5 +161,5 @@ static struct usb_driver plusb_driver =
  module_usb_driver(plusb_driver);

  MODULE_AUTHOR("David Brownell");
-MODULE_DESCRIPTION("Prolific PL-2301/2302/25A1 USB Host to Host Link Driver");
+MODULE_DESCRIPTION("Prolific PL-2301/2302/25A1/2501 USB Host to Host
Link Driver");
  MODULE_LICENSE("GPL");