[PATCH net] hv_netvsc: ignore devices that are not PCI

[PATCH net] hv_netvsc: ignore devices that are not PCI

[Stephen Hemminger]

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: e8ff40d4bff1 ("hv_netvsc: improve VF device matching")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
 drivers/net/hyperv/netvsc_drv.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 507f68190cb1..1121a1ec407c 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -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
-- 
2.18.0

Re: [PATCH net] hv_netvsc: ignore devices that are not PCI

[David Miller]

From: Stephen Hemminger <stephen@networkplumber.org>
Date: Tue, 21 Aug 2018 10:40:38 -0700

> 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: e8ff40d4bff1 ("hv_netvsc: improve VF device matching")
> Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>

Applied and queued up for -stable.