octeon_ep: fix VF MAC address lifecycle handling

JIRA: https://issues.redhat.com/browse/RHEL-109634

commit a72175c
Author: Sathesh B Edara <sedara@marvell.com>
Date:   Tue Sep 16 06:32:07 2025 -0700

    octeon_ep: fix VF MAC address lifecycle handling

    Currently, VF MAC address info is not updated when the MAC address is
    configured from VF, and it is not cleared when the VF is removed. This
    leads to stale or missing MAC information in the PF, which may cause
    incorrect state tracking or inconsistencies when VFs are hot-plugged
    or reassigned.

    Fix this by:
     - storing the VF MAC address in the PF when it is set from VF
     - clearing the stored VF MAC address when the VF is removed

    This ensures that the PF always has correct VF MAC state.

    Fixes: cde29af ("octeon_ep: add PF-VF mailbox communication")
    Signed-off-by: Sathesh B Edara <sedara@marvell.com>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Link: https://patch.msgid.link/20250916133207.21737-1-sedara@marvell.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Kamal Heib <kheib@redhat.com>

Author: Kamalheib

drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c

@@ -195,6 +195,7 @@ static void octep_pfvf_get_mac_addr(struct octep_device *oct,  u32 vf_id,
 			vf_id);
 		return;
 	}
+	ether_addr_copy(oct->vf_info[vf_id].mac_addr, rsp->s_set_mac.mac_addr);
 	rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
 }
 
@@ -204,6 +205,8 @@ static void octep_pfvf_dev_remove(struct octep_device *oct,  u32 vf_id,
 {
 	int err;
 
+	/* Reset VF-specific information maintained by the PF */
+	memset(&oct->vf_info[vf_id], 0, sizeof(struct octep_pfvf_info));
 	err = octep_ctrl_net_dev_remove(oct, vf_id);
 	if (err) {
 		rsp->s.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;