[PATCH] uml: free network IRQ correctly

Free the network IRQ when closing down the network devices at shutdown.
Delete the device from the opened devices list on close.

These prevent an -EBADF when later disabling SIGIO on all extant descriptors
and a complaint from free_irq about freeing the IRQ twice.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/drivers/net_kern.c

@@ -150,6 +150,7 @@ static int uml_net_close(struct net_device *dev)
 	if(lp->close != NULL)
 		(*lp->close)(lp->fd, &lp->user);
 	lp->fd = -1;
+	list_del(&lp->list);
 
 	spin_unlock(&lp->lock);
 	return 0;
@@ -715,6 +716,7 @@ static void close_devices(void)
 
 	list_for_each(ele, &opened){
 		lp = list_entry(ele, struct uml_net_private, list);
+		free_irq(lp->dev->irq, lp->dev);
 		if((lp->close != NULL) && (lp->fd >= 0))
 			(*lp->close)(lp->fd, &lp->user);
 		if(lp->remove != NULL) (*lp->remove)(&lp->user);