Hi,
I overlooked one. Setting the flag and killing the URBs must be under the lock
so that no URB is submitted after usb_kill_urb()
Regards
Oliver
--- a/drivers/usb/image/mdc800.c 2007-01-05 16:47:56.000000000 +0100
+++ b/drivers/usb/image/mdc800.c 2007-01-05 16:48:05.000000000 +0100
@@ -565,11 +565,15 @@
usb_deregister_dev(intf, &mdc800_class);
+ /* must be under lock to make sure no URB
+ is submitted after usb_kill_urb() */
+ mutex_lock(&mdc800->io_lock);
mdc800->state=NOT_CONNECTED;
usb_kill_urb(mdc800->irq_urb);
usb_kill_urb(mdc800->write_urb);
usb_kill_urb(mdc800->download_urb);
+ mutex_unlock(&mdc800->io_lock);
mdc800->dev = NULL;
usb_set_intfdata(intf, NULL);
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