octeontx2-af: fix VF bringup affecting PF promiscuous state

Mbox handling of nix_set_rx_mode for a VF with promiscuous and
all_multi flags set to false causes deletion of the PF's promiscuous
and allmulti MCAM rules. This occurs because the APIs that
enable/disable these rules operate only on the PF, even when the
mbox request is made via a VF interface.

Guard both rvu_npc_enable_allmulti_entry() and
rvu_npc_enable_promisc_entry() disable paths with an is_vf() check so
that a VF bringing up or tearing down its interface cannot inadvertently
clear the PF's MCAM rules.

Fixes: 967db3529eca ("octeontx2-af: add support for multicast/promisc packet replication feature")
Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Nitin Shetty J <nshettyj@marvell.com>
Link: https://patch.msgid.link/20260702045616.3002773-2-nshettyj@marvell.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 0297c7ab0614eacb17aabaedf1946ef1e3ff4f50..6a0ce2665031d6a630551665b502b17217e88d55 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -4580,7 +4580,7 @@ int rvu_mbox_handler_nix_set_rx_mode(struct rvu *rvu, struct nix_rx_mode *req,
                rvu_npc_install_allmulti_entry(rvu, pcifunc, nixlf,
                                               pfvf->rx_chan_base);
        } else {
-               if (!nix_rx_multicast)
+               if (!nix_rx_multicast && !is_vf(pcifunc))
                        rvu_npc_enable_allmulti_entry(rvu, pcifunc, nixlf, false);
        }
 
@@ -4590,7 +4590,7 @@ int rvu_mbox_handler_nix_set_rx_mode(struct rvu *rvu, struct nix_rx_mode *req,
                                              pfvf->rx_chan_base,
                                              pfvf->rx_chan_cnt);
        else
-               if (!nix_rx_multicast)
+               if (!nix_rx_multicast && !is_vf(pcifunc))
                        rvu_npc_enable_promisc_entry(rvu, pcifunc, nixlf, false);
 
        return 0;