From: Bjørn Mork <bjorn@mork.no>
Date: Sun, 15 Jul 2012 14:47:39 +0000 (+0200)
Subject: USB: qcserial: support generic Qualcomm serial ports
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e7ad21e00eab6b77fb9b5cd79512b7dee473f476;p=linux-beck.git

USB: qcserial: support generic Qualcomm serial ports

No need to verify the interface layout when doing
interface number based matching.  We can safely trust
the device ID table in this case.

This allows the driver to support any USB interface
layout for non-Gobi 1k/2k+ devices.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index a9c4dc4eb05f..90395c7aa56a 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -165,6 +165,13 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 
 	}
 
+	/* allow any number of interfaces when doing direct interface match */
+	if (id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) {
+		dev_dbg(dev, "Generic Qualcomm serial interface found\n");
+		altsetting = 0;
+		goto done;
+	}
+
 	if (nintf < 3 || nintf > 4) {
 		dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 		goto done;