git: 1cce5ef05d7b - main - lagg: re-check port caps after bringing up a port

The branch main has been updated by gallatin:

URL: https://cgit.FreeBSD.org/src/commit/?id=1cce5ef05d7ba077b0cb29d30b59f3a862e7e5ae

commit 1cce5ef05d7ba077b0cb29d30b59f3a862e7e5ae
Author:     Andrew Gallatin <gallatin@FreeBSD.org>
AuthorDate: 2026-07-08 12:24:35 +0000
Commit:     Andrew Gallatin <gallatin@FreeBSD.org>
CommitDate: 2026-07-08 12:27:58 +0000

    lagg: re-check port caps after bringing up a port
    
    Some nic drivers (including iflib) do not initialize if_hwassist
    until after the interface is brought up.  If a lagg member is included
    in a lagg when its not yet been brought up, that will cause lagg to see
    if_hwassist=0 and will disable all checksum offload, etc, on the interface.
    This is almost impossible to debug without kgdb or dtrace, as ifconfig does
    not surface if_hwassist.
    
    Fix this by re-calculating lagg caps (including if_hwassist) after adding a port.
    
    I encountered this problem when I had a commented-out if_foo1=up entry in
    my rc.conf that i neglected to uncomment when I was re-configuring a lagg.
    
    Sponsored by: Netflix
    Reviewed by: markj, zlei
    Differential Revision: https://reviews.freebsd.org/D58062
---
 sys/net/if_lagg.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/net/if_lagg.c b/sys/net/if_lagg.c
index da08e02d50be..e8e0306b0d1f 100644
--- a/sys/net/if_lagg.c
+++ b/sys/net/if_lagg.c
@@ -1309,6 +1309,8 @@ lagg_init_locked(struct lagg_softc *sc)
 
 	lagg_if_updown(sc, true);
 
+	/* Recheck port caps; bringing them up may have changed if_hwassist. */
+	lagg_capabilities(sc);
 	lagg_proto_init(sc);
 
 	if (ifp->if_type == IFT_INFINIBAND) {