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if_bridge: use IF_MINMTU

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Replace incorrect constant 576 with IF_MINMTU to check for minumum MTU.
This unbreaks bridging tap interfaces with small mtu.

MFC after:	1 week
This commit is contained in:
Eugene Grosbein 2024-04-01 10:31:51 +07:00
parent ee36e7face
commit 319a5d086b
1 changed files with 1 additions and 1 deletions
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2
sys/net/if_bridge.c
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@ -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;
}