git: 9407889ec214 - stable/14 - MFC: if_bridge: use IF_MINMTU

The branch stable/14 has been updated by eugen:

URL: https://cgit.FreeBSD.org/src/commit/?id=9407889ec214893ca639468e762efc4ba3875058

commit 9407889ec214893ca639468e762efc4ba3875058
Author:     Eugene Grosbein <eugen@FreeBSD.org>
AuthorDate: 2024-04-01 03:31:51 +0000
Commit:     Eugene Grosbein <eugen@FreeBSD.org>
CommitDate: 2024-04-09 10:07:45 +0000

    MFC: if_bridge: use IF_MINMTU
    
    Replace incorrect constant 576 with IF_MINMTU to check for minumum MTU.
    This unbreaks bridging tap interfaces with small mtu.
    
    (cherry picked from commit 319a5d086b50f38618b62c78e83b12931f00b508)
---
 sys/net/if_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/net/if_bridge.c b/sys/net/if_bridge.c
index fe5de468bf28..31758733adb1 100644
--- a/sys/net/if_bridge.c
+++ b/sys/net/if_bridge.c
@@ -960,7 +960,7 @@ bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 	case SIOCSIFMTU:
 		oldmtu = sc->sc_ifp->if_mtu;
 
-		if (ifr->ifr_mtu < 576) {
+		if (ifr->ifr_mtu < IF_MINMTU) {
 			error = EINVAL;
 			break;
 		}