From 89ed20a9b6b1ae45eb8afba377ef80b202b6d767 Mon Sep 17 00:00:00 2001
From: Tai-hwa Liang <avatar@FreeBSD.org>
Date: Sat, 10 Apr 2021 15:32:27 +0000
Subject: [PATCH] if_firewire: fixing panic upon packet reception for VNET
 build

netisr_dispatch_src() needs valid VNET pointer or firewire_input() will panic
when receiving a packet.

Reviewed by:	glebius
MFC after:	2 weeks

(cherry picked from commit d9b61e7153c64b141436b4d9619b166c6d35a0a6)
---
 sys/net/if_fwsubr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/net/if_fwsubr.c b/sys/net/if_fwsubr.c
index d6296bf33b6..29ca2f713e8 100644
--- a/sys/net/if_fwsubr.c
+++ b/sys/net/if_fwsubr.c
@@ -634,7 +634,9 @@ firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
 	}
 
 	M_SETFIB(m, ifp->if_fib);
+	CURVNET_SET_QUIET(ifp->if_vnet);
 	netisr_dispatch(isr, m);
+	CURVNET_RESTORE();
 }
 
 int