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authorDavid Vrabel <david.vrabel@citrix.com>2014-02-04 22:50:26 +0400
committerDavid S. Miller <davem@davemloft.net>2014-02-05 08:42:36 +0400
commitbce3ea81d5b2a33ed0e275d58a45f10ce95cbd50 (patch)
tree3262f7cee9e9a76d2576ba9ff698492dd5aad902 /drivers/net/xen-netfront.c
parente8c37aff2a392c31fefa62ec045058a0877c45a1 (diff)
downloadlinux-bce3ea81d5b2a33ed0e275d58a45f10ce95cbd50.tar.xz
xen-netfront: handle backend CLOSED without CLOSING
Backend drivers shouldn't transistion to CLOSED unless the frontend is CLOSED. If a backend does transition to CLOSED too soon then the frontend may not see the CLOSING state and will not properly shutdown. So, treat an unexpected backend CLOSED state the same as CLOSING. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
-rw-r--r--drivers/net/xen-netfront.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index ff04d4f95baa..f9daa9e183f2 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1832,7 +1832,6 @@ static void netback_changed(struct xenbus_device *dev,
case XenbusStateReconfiguring:
case XenbusStateReconfigured:
case XenbusStateUnknown:
- case XenbusStateClosed:
break;
case XenbusStateInitWait:
@@ -1847,6 +1846,10 @@ static void netback_changed(struct xenbus_device *dev,
netdev_notify_peers(netdev);
break;
+ case XenbusStateClosed:
+ if (dev->state == XenbusStateClosed)
+ break;
+ /* Missed the backend's CLOSING state -- fallthrough */
case XenbusStateClosing:
xenbus_frontend_closed(dev);
break;