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Commit 07d0f000 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
Browse files

hv_netvsc: dev hold/put reference to VF 



The netvsc driver holds a pointer to the virtual function network device if
managing SR-IOV association. In order to ensure that the VF network device
does not disappear, it should be using dev_hold/dev_put to get a reference
count.

Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 17db4bce

drivers/net/hyperv/netvsc_drv.c

+3 −0
Original line number Diff line number Diff line
@@ -1262,6 +1262,8 @@ static int netvsc_register_vf(struct net_device *vf_netdev) 
	 * Take a reference on the module.

	 */

	try_module_get(THIS_MODULE);



	dev_hold(vf_netdev);

	net_device_ctx->vf_netdev = vf_netdev;

	return NOTIFY_OK;

}
@@ -1376,6 +1378,7 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev) 
	netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name);

	netvsc_inject_disable(net_device_ctx);

	net_device_ctx->vf_netdev = NULL;

	dev_put(vf_netdev);

	module_put(THIS_MODULE);

	return NOTIFY_OK;

}