netdev - [PATCH] virtio_net: Give indication on device probe failure.

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Message-Id: <20111124082421.26821.71126.sendpatchset@krkumar2.in.ibm.com>
Date:	Thu, 24 Nov 2011 13:54:21 +0530
From:	Krishna Kumar <krkumar2@...ibm.com>
To:	rusty@...tcorp.com.au, mst@...hat.com
Cc:	netdev@...r.kernel.org, levinsasha928@...il.com,
	Krishna Kumar <krkumar2@...ibm.com>, davem@...emloft.net
Subject: [PATCH] virtio_net: Give indication on device probe failure.

Provide an indication when the virtio_net device fails to
initialize.

Signed-off-by: Krishna Kumar <krkumar2@...ibm.com>
---
 drivers/net/virtio_net.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff -ruNp org/drivers/net/virtio_net.c new/drivers/net/virtio_net.c
--- org/drivers/net/virtio_net.c	2011-11-24 11:53:08.000000000 +0530
+++ new/drivers/net/virtio_net.c	2011-11-24 13:51:32.000000000 +0530
@@ -971,7 +971,7 @@ static void virtnet_config_changed(struc
 
 static int virtnet_probe(struct virtio_device *vdev)
 {
-	int err;
+	int err = -ENOMEM;
 	struct net_device *dev;
 	struct virtnet_info *vi;
 	struct virtqueue *vqs[3];
@@ -982,7 +982,7 @@ static int virtnet_probe(struct virtio_d
 	/* Allocate ourselves a network device with room for our info */
 	dev = alloc_etherdev(sizeof(struct virtnet_info));
 	if (!dev)
-		return -ENOMEM;
+		goto out;
 
 	/* Set up network device as normal. */
 	dev->priv_flags |= IFF_UNICAST_FLT;
@@ -1032,7 +1032,6 @@ static int virtnet_probe(struct virtio_d
 	vdev->priv = vi;
 	vi->pages = NULL;
 	vi->stats = alloc_percpu(struct virtnet_stats);
-	err = -ENOMEM;
 	if (vi->stats == NULL)
 		goto free;
 
@@ -1104,6 +1103,8 @@ free_stats:
 	free_percpu(vi->stats);
 free:
 	free_netdev(dev);
+out:
+	dev_err(&vdev->dev, "Device probe failed with errno: %d\n", err);
 	return err;
 }
 

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