From: Richard Weinberger <richard@nod.at>
Date: Tue, 26 Jul 2011 00:12:48 +0000 (-0700)
Subject: um: add netpoll support
X-Git-Tag: firefly_0821_release~3680^2~4933^2~57
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dd71dc4c335a8957d269ce063b3e80933f3482fc;p=firefly-linux-kernel-4.4.55.git

um: add netpoll support

To make netconsole usable on UML, its ethernet driver needs netpoll
support.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 47d0c37897d5..22745b47c829 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -262,6 +262,15 @@ static int uml_net_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void uml_net_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	uml_net_interrupt(dev->irq, dev);
+	enable_irq(dev->irq);
+}
+#endif
+
 static void uml_net_get_drvinfo(struct net_device *dev,
 				struct ethtool_drvinfo *info)
 {
@@ -364,6 +373,9 @@ static const struct net_device_ops uml_netdev_ops = {
 	.ndo_set_mac_address	= eth_mac_addr,
 	.ndo_change_mtu 	= uml_net_change_mtu,
 	.ndo_validate_addr	= eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller = uml_net_poll_controller,
+#endif
 };
 
 /*