iavf: remove INITIAL_MAC_SET to allow gARP to work properly

IAVF_FLAG_INITIAL_MAC_SET prevents waiting on iavf_is_mac_set_handled()
the first time the MAC is set. This breaks gratuitous ARP because the
MAC address has not been updated yet when the gARP packet is sent out.

Current behaviour:
$ echo 1 > /sys/class/net/ens4f0/device/sriov_numvfs
iavf 0000:88:02.0: MAC address: ee:04:19:14:ec:ea
$ ip addr add 192.168.1.1/24 dev ens4f0v0
$ ip link set dev ens4f0v0 up
$ echo 1 > /proc/sys/net/ipv4/conf/ens4f0v0/arp_notify
$ ip link set ens4f0v0 addr 00:11:22:33:44:55
07:23:41.676611 ee:04:19:14:ec:ea > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.1, length 28

With IAVF_FLAG_INITIAL_MAC_SET removed:
$ echo 1 > /sys/class/net/ens4f0/device/sriov_numvfs
iavf 0000:88:02.0: MAC address: 3e:8a:16:a2:37:6d
$ ip addr add 192.168.1.1/24 dev ens4f0v0
$ ip link set dev ens4f0v0 up
$ echo 1 > /proc/sys/net/ipv4/conf/ens4f0v0/arp_notify
$ ip link set ens4f0v0 addr 00:11:22:33:44:55
07:28:01.836608 00:11:22:33:44:55 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.1, length 28

Fixes: 35a2443d0910 ("iavf: Add waiting for response from PF in set mac")
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/iavf/iavf.h b/drivers/net/ethernet/intel/iavf/iavf.h
index 3f6187c..0d1bab4 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf.h
+++ b/drivers/net/ethernet/intel/iavf/iavf.h
@@ -298,7 +298,6 @@ struct iavf_adapter {
 #define IAVF_FLAG_QUEUES_DISABLED              BIT(17)
 #define IAVF_FLAG_SETUP_NETDEV_FEATURES                BIT(18)
 #define IAVF_FLAG_REINIT_MSIX_NEEDED           BIT(20)
-#define IAVF_FLAG_INITIAL_MAC_SET              BIT(23)
 /* duplicates for common code */
 #define IAVF_FLAG_DCB_ENABLED                  0
        /* flags for admin queue service task */

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index b66f8fa..801f5b7 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -1087,12 +1087,6 @@ static int iavf_set_mac(struct net_device *netdev, void *p)
        if (ret)
                return ret;
 
-       /* If this is an initial set MAC during VF spawn do not wait */
-       if (adapter->flags & IAVF_FLAG_INITIAL_MAC_SET) {
-               adapter->flags &= ~IAVF_FLAG_INITIAL_MAC_SET;
-               return 0;
-       }
-
        ret = wait_event_interruptible_timeout(adapter->vc_waitqueue,
                                               iavf_is_mac_set_handled(netdev, addr->sa_data),
                                               msecs_to_jiffies(2500));
@@ -2605,8 +2599,6 @@ static void iavf_init_config_adapter(struct iavf_adapter *adapter)
                ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
        }
 
-       adapter->flags |= IAVF_FLAG_INITIAL_MAC_SET;
-
        adapter->tx_desc_count = IAVF_DEFAULT_TXD;
        adapter->rx_desc_count = IAVF_DEFAULT_RXD;
        err = iavf_init_interrupt_scheme(adapter);