git: 786c71845f80 - main - ixgbe: disable VF multicast reception for empty list

The branch main has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=786c71845f80b8bf733d07f9155de9740a8cbc19

commit 786c71845f80b8bf733d07f9155de9740a8cbc19
Author:     Wei Zhao <wei.zhao1@intel.com>
AuthorDate: 2026-07-28 11:20:32 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-07-31 11:38:25 +0000

    ixgbe: disable VF multicast reception for empty list
    
    Clear ROMPE for an empty list and enable it only for a nonempty list.
    FreeBSD already clears ROMPE when resetting a VF, so that part of the
    DPDK change is not needed.
    
    DPDK commit message
    
    net/ixgbe: fix over using multicast table for VF
    
    VMOLR.ROMPE allows a VF to receive packets matching the shared multicast
    table.  Leaving it enabled after the VF removes its last multicast
    address lets PF or peer-VF table entries continue selecting that VF.
    
    Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
    Acked-by: Qi Zhang <qi.z.zhang@intel.com>
    
    Obtained from:  DPDK (dc5a6e7422)
    MFC after:      1 week
---
 sys/dev/ixgbe/if_sriov.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/dev/ixgbe/if_sriov.c b/sys/dev/ixgbe/if_sriov.c
index c822303a4067..8d4e20fcf8bf 100644
--- a/sys/dev/ixgbe/if_sriov.c
+++ b/sys/dev/ixgbe/if_sriov.c
@@ -437,7 +437,10 @@ ixgbe_vf_set_mc_addr(struct ixgbe_softc *sc, struct ixgbe_vf *vf, u32 *msg)
 		IXGBE_WRITE_REG(&sc->hw, IXGBE_MTA(vec_reg), mta_reg);
 	}
 
-	vmolr |= IXGBE_VMOLR_ROMPE;
+	if (entries == 0)
+		vmolr &= ~IXGBE_VMOLR_ROMPE;
+	else
+		vmolr |= IXGBE_VMOLR_ROMPE;
 	IXGBE_WRITE_REG(&sc->hw, IXGBE_VMOLR(vf->pool), vmolr);
 	ixgbe_send_vf_success(sc, vf, msg[0]);
 } /* ixgbe_vf_set_mc_addr */