commit 57ab12e418ec4fe24c11788bb1bbdabb29d05679
Author: Jiri Kosina <jkosina at suse.cz>
Date:   Wed Feb 17 14:25:01 2010 +0100

    HID: usbhid: initialize interface pointers early enough
    
    Move the initialization of USB interface pointers from _start()
    over to _probe() callback, which is where it belongs.
    
    This fixes case where interface is NULL when parsing of report
    descriptor fails.
    
    LKML-Reference: <20100213135720.603e5f64 at neptune.home>
    Reported-by: Alan Stern <stern at rowland.harvard.edu>
    Tested-by: Bruno Prémont <bonbons at linux-vserver.org>
    Signed-off-by: Jiri Kosina <jkosina at suse.cz>

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 74bd3ca..ceaf4a1 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1005,9 +1005,6 @@ static int usbhid_start(struct hid_device *hid)
 
 	spin_lock_init(&usbhid->lock);
 
-	usbhid->intf = intf;
-	usbhid->ifnum = interface->desc.bInterfaceNumber;
-
 	usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 	if (!usbhid->urbctrl) {
 		ret = -ENOMEM;
@@ -1178,6 +1175,8 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
 
 	hid->driver_data = usbhid;
 	usbhid->hid = hid;
+	usbhid->intf = intf;
+	usbhid->ifnum = interface->desc.bInterfaceNumber;
 
 	ret = hid_add_device(hid);
 	if (ret) {