Input: aiptek - fix crash on detecting device without endpoints

[pandora-kernel.git] / drivers / input / tablet / aiptek.c

diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index 6d89fd1..5657018 100644 (file)
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1810,6 +1810,14 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
        input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
        input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
 
+       /* Verify that a device really has an endpoint */
+       if (intf->altsetting[0].desc.bNumEndpoints < 1) {
+               dev_err(&intf->dev,
+                       "interface has %d endpoints, but must have minimum 1\n",
+                       intf->altsetting[0].desc.bNumEndpoints);
+               err = -EINVAL;
+               goto fail3;
+       }
        endpoint = &intf->altsetting[0].endpoint[0].desc;
 
        /* Go set up our URB, which is called when the tablet receives
@@ -1852,6 +1860,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
        if (i == ARRAY_SIZE(speeds)) {
                dev_info(&intf->dev,
                         "Aiptek tried all speeds, no sane response\n");
+               err = -EINVAL;
                goto fail2;
        }