[PATCH net v2 1/2] octeontx2-af: fix VF bringup affecting PF promiscuous state

[nshettyj]

From: Harman Kalra <hkalra@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Signed-off-by: Nitin Shetty J <nshettyj@xxxxxxxxxxx>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index d8989395e875..a7e0e0e05ad2 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -4575,7 +4575,7 @@ 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);
 	}
 
@@ -4585,7 +4585,7 @@ 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;
-- 
2.48.1