From 4dd896995c50676c65eccf8a3b87241507dd0726 Mon Sep 17 00:00:00 2001
From: Will Andrews <will@FreeBSD.org>
Date: Wed, 21 Jan 2015 20:06:25 +0000
Subject: [PATCH] Fix firewire panic when issuing a reply to an unhandled
 asynchronous remote dma request (DMA request that the hardware cannot
 automatically handle).

sys/dev/firewire/firewire.c
	In fw_rcv(), add missing early return in the error
	path for DMA requests to unregistered regions.

Submitted by:	gibbs
MFC after:	1 week
Sponsored by:	Spectra Logic
MFSpectraBSD:	1110993 on 2015/01/06
---
 sys/dev/firewire/firewire.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/dev/firewire/firewire.c b/sys/dev/firewire/firewire.c
index 976be69e721d..72341887f46a 100644
--- a/sys/dev/firewire/firewire.c
+++ b/sys/dev/firewire/firewire.c
@@ -2030,6 +2030,7 @@ fw_rcv(struct fw_rcv_buf *rb)
 			rb->xfer->hand = fw_xfer_free;
 			if (fw_asyreq(rb->fc, -1, rb->xfer))
 				fw_xfer_free(rb->xfer);
+			return;
 		}
 		len = 0;
 		for (i = 0; i < rb->nvec; i++)