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hv_netvsc: ignore devices that are not PCI 

Registering another device with same MAC address (such as TAP, VPN or
DPDK KNI) will confuse the VF autobinding logic.  Restrict the search
to only run if the device is known to be a PCI attached VF.

Fixes: e8ff40d4bf ("hv_netvsc: improve VF device matching")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2018-08-21 10:40:38 -07:00 committed by David S. Miller
parent c27f1e2e9f
commit b93c1b5ac8
1 changed files with 5 additions and 0 deletions
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5
drivers/net/hyperv/netvsc_drv.c
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@ -29,6 +29,7 @@
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
@ -2039,12 +2040,16 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
{
struct net_device *ndev;
struct net_device_context *net_device_ctx;
struct device *pdev = vf_netdev->dev.parent;
struct netvsc_device *netvsc_dev;
int ret;
if (vf_netdev->addr_len != ETH_ALEN)
return NOTIFY_DONE;
if (!pdev || !dev_is_pci(pdev) || dev_is_pf(pdev))
return NOTIFY_DONE;
/*
* We will use the MAC address to locate the synthetic interface to
* associate with the VF interface. If we don't find a matching