The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5c8e3c7ff3e7bd7b938659be704f75cc746b697f Mon Sep 17 00:00:00 2001 From: Anirudh Venkataramanan anirudh.venkataramanan@intel.com Date: Thu, 21 Jul 2022 10:03:09 +0200 Subject: [PATCH] ice: Fix VSIs unable to share unicast MAC

The driver currently does not allow two VSIs in the same PF domain to have the same unicast MAC address. This is incorrect in the sense that a policy decision is being made in the driver when it must be left to the user. This approach was causing issues when rebooting the system with VFs spawned not being able to change their MAC addresses. Such errors were present in dmesg:

[ 7921.068237] ice 0000:b6:00.2 ens2f2: Unicast MAC 6a:0d:e4:70:ca:d1 already exists on this PF. Preventing setting VF 7 unicast MAC address to 6a:0d:e4:70:ca:d1

Fix that by removing this restriction. Doing this also allows us to remove some additional code that's checking if a unicast MAC filter already exists.

Fixes: 47ebc7b02485 ("ice: Check if unicast MAC exists before setting VF MAC") Signed-off-by: Anirudh Venkataramanan anirudh.venkataramanan@intel.com Signed-off-by: Sylwester Dziedziuch sylwesterx.dziedziuch@intel.com Signed-off-by: Mateusz Palczewski mateusz.palczewski@intel.com Signed-off-by: Jedrzej Jagielski jedrzej.jagielski@intel.com Tested-by: Marek Szlosek marek.szlosek@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index ff2eac2f8c64..b41a45c03d22 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -4656,6 +4656,8 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) ice_set_safe_mode_caps(hw); }

+ hw->ucast_shared = true; + err = ice_init_pf(pf); if (err) { dev_err(dev, "ice_init_pf failed: %d\n", err); diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c b/drivers/net/ethernet/intel/ice/ice_sriov.c index bb1721f1321d..f4907a3c2d19 100644 --- a/drivers/net/ethernet/intel/ice/ice_sriov.c +++ b/drivers/net/ethernet/intel/ice/ice_sriov.c @@ -1309,39 +1309,6 @@ ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi) return ret; }

-/** - * ice_unicast_mac_exists - check if the unicast MAC exists on the PF's switch - * @pf: PF used to reference the switch's rules - * @umac: unicast MAC to compare against existing switch rules - * - * Return true on the first/any match, else return false - */ -static bool ice_unicast_mac_exists(struct ice_pf *pf, u8 *umac) -{ - struct ice_sw_recipe *mac_recipe_list = - &pf->hw.switch_info->recp_list[ICE_SW_LKUP_MAC]; - struct ice_fltr_mgmt_list_entry *list_itr; - struct list_head *rule_head; - struct mutex *rule_lock; /* protect MAC filter list access */ - - rule_head = &mac_recipe_list->filt_rules; - rule_lock = &mac_recipe_list->filt_rule_lock; - - mutex_lock(rule_lock); - list_for_each_entry(list_itr, rule_head, list_entry) { - u8 *existing_mac = &list_itr->fltr_info.l_data.mac.mac_addr[0]; - - if (ether_addr_equal(existing_mac, umac)) { - mutex_unlock(rule_lock); - return true; - } - } - - mutex_unlock(rule_lock); - - return false; -} - /** * ice_set_vf_mac * @netdev: network interface device structure @@ -1376,13 +1343,6 @@ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) if (ret) goto out_put_vf;

- if (ice_unicast_mac_exists(pf, mac)) { - netdev_err(netdev, "Unicast MAC %pM already exists on this PF. Preventing setting VF %u unicast MAC address to %pM\n", - mac, vf_id, mac); - ret = -EINVAL; - goto out_put_vf; - } - mutex_lock(&vf->cfg_lock);

/* VF is notified of its new MAC via the PF's response to the