Re: [dpdk-dev] [PATCH] net/ixgbe: fix default MAC setting

["Lu, Wenzhuo" <wenzhuo.lu@intel.com>]

Hi Igor,

From: Igor Ryzhov [mailto:iryzhov@nfware.com]
Sent: Tuesday, May 2, 2017 9:33 PM
To: Lu, Wenzhuo
Cc: dev@dpdk.org; stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] net/ixgbe: fix default MAC setting

Hello Wenzhuo,

How about also delete meaningless "ixgbe_remove_rar(dev, 0);"?
[Wenzhuo] The current behavior of this set_default_mac_addr is to delete all  the existing MAC addresses and only set the assigned address as the default address. This patch is to fix a bug not change the behavior. So have to leave "ixgbe_remove_rar(dev, 0);" here.

Best regards,
Igor

On Tue, May 2, 2017 at 11:34 AM, Wenzhuo Lu <wenzhuo.lu@intel.com<mailto:wenzhuo.lu@intel.com>> wrote:
Pool 0 is not PF, it's VF 0. So the MAC is set for VF 0
but not PF.
The code introduced a weird issue. In the scenario PF + VF,
when only starting PF, the default PF MAC address is working.
But after starting a VF, the default PF MAC address becomes
the VF's address.

Use the pool which is not occupied by VFs for PF to fix it.

Fixes: 8164fe82846b ("ixgbe: add default mac address modifier")
Cc: stable@dpdk.org<mailto:stable@dpdk.org>

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com<mailto:wenzhuo.lu@intel.com>>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index bbae4f9..9ddd685 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4658,9 +4658,11 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 static void
 ixgbe_set_default_mac_addr(struct rte_eth_dev *dev, struct ether_addr *addr)
 {
+       struct rte_pci_device *pci_dev = IXGBE_DEV_TO_PCI(dev);
+
        ixgbe_remove_rar(dev, 0);

-       ixgbe_add_rar(dev, addr, 0, 0);
+       ixgbe_add_rar(dev, addr, 0, pci_dev->max_vfs);
 }

 static bool
--
1.9.3