linux-kernel - [PATCH 2/3] usbtouchscreen: find input endpoint automatically

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200911231104.42154.linux@rainbow-software.org>
Date:	Mon, 23 Nov 2009 11:04:40 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	linux-usb@...r.kernel.org, daniel.ritz@....ch,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] usbtouchscreen: find input endpoint automatically

Find input enpoint automatically instead of assuming that the first one is OK.
This is needed for devices with multiple endpoints such as iNexio where the
first endpoint might be output.


Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

--- linux-source-2.6.31/drivers/input/touchscreen/usbtouchscreen.c.1	2009-11-23 10:30:14.000000000 +0100
+++ linux-source-2.6.31/drivers/input/touchscreen/usbtouchscreen.c	2009-11-23 10:57:14.000000000 +0100
@@ -882,17 +882,25 @@ static int usbtouch_probe(struct usb_int
 	struct usbtouch_usb *usbtouch;
 	struct input_dev *input_dev;
 	struct usb_host_interface *interface;
-	struct usb_endpoint_descriptor *endpoint;
+	struct usb_endpoint_descriptor *endpoint = NULL;
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct usbtouch_device_info *type;
 	int err = -ENOMEM;
+	int i;
 
 	/* some devices are ignored */
 	if (id->driver_info == DEVTYPE_IGNORE)
 		return -ENODEV;
 
 	interface = intf->cur_altsetting;
-	endpoint = &interface->endpoint[0].desc;
+	/* find first input endpoint */
+	for (i = 0; i < interface->desc.bNumEndpoints; i++)
+		if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) {
+			endpoint = &interface->endpoint[i].desc;
+			break;
+		}
+	if (!endpoint)
+		return -ENXIO;
 
 	usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 	input_dev = input_allocate_device();


-- 
Ondrej Zary
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/