[PATCH 3/4] iseries_veth: Don't leak skbs in RX path

[Michael Ellerman <michael@xxxxxxxxxxxxxx>]

Hi Andrew, Jeff,

Under some strange circumstances the iseries_veth driver can leak skbs.

Fix is simply to call dev_kfree_skb() in the right place.
Fix up the comment as well.

Signed-off-by: Michael Ellerman <michael@xxxxxxxxxxxxxx>
--

 iseries_veth.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

Index: veth-fixes/drivers/net/iseries_veth.c
===================================================================
--- veth-fixes.orig/drivers/net/iseries_veth.c
+++ veth-fixes/drivers/net/iseries_veth.c
@@ -1264,13 +1264,18 @@ static void veth_receive(struct veth_lpa
 
                vlan = skb->data[9];
                dev = veth_dev[vlan];
-               if (! dev)
-                       /* Some earlier versions of the driver sent
-                          broadcasts down all connections, even to
-                          lpars that weren't on the relevant vlan.
-                          So ignore packets belonging to a vlan we're
-                          not on. */
+               if (! dev) {
+                       /*
+                        * Some earlier versions of the driver sent
+                        * broadcasts down all connections, even to lpars
+                        * that weren't on the relevant vlan. So ignore
+                        * packets belonging to a vlan we're not on.
+                        * We can also be here if we receive packets while
+                        * the driver is going down, because then dev is NULL.
+                        */
+                       dev_kfree_skb_irq(skb);
                        continue;
+               }
 
                port = (struct veth_port *)dev->priv;
                dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000;