[Xen-devel] [RFC PATCH V2 5/8] netback: add module get/put operations along with vif connect/disconnect.

[Wei Liu <wei.liu2@xxxxxxxxxx>]

If there is vif running and user unloads netback, it will certainly
cause problems -- guest's network interface just mysteriously stops
working.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 drivers/net/xen-netback/interface.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/net/xen-netback/interface.c 
b/drivers/net/xen-netback/interface.c
index dfc04f8..7c86187 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -323,6 +323,8 @@ int xenvif_connect(struct xenvif *vif, unsigned long 
tx_ring_ref,
        if (vif->irq)
                return 0;
 
+       __module_get(THIS_MODULE);
+
        err = xen_netbk_map_frontend_rings(vif, tx_ring_ref, rx_ring_ref);
        if (err < 0)
                goto err;
@@ -405,4 +407,6 @@ void xenvif_disconnect(struct xenvif *vif)
        xen_netbk_unmap_frontend_rings(vif);
 
        free_netdev(vif->dev);
+
+       module_put(THIS_MODULE);
 }
-- 
1.7.2.5


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