[Linux-decnet-user] Fix for DECnet routing bug

[Steven W. <st...@ch...>]

Hi,

I've had this one on my list for a while. Does this fix the DECnet routing
bug that you reported the other day? If so please send to davem,

Steve.

------------------------------------------------------------------------------

This patch fixes a bug in the DECnet routing code where we were selecting
a loopback device in preference to an outward facing device even when
the destination was known non-local. This patch should fix the problem.

Signed-off-by: Steven Whitehouse <st...@ch...>

diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 1355614..743e9fc 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -925,8 +925,13 @@ static int dn_route_output_slow(struct d
 		for(dev_out = dev_base; dev_out; dev_out = dev_out->next) {
 			if (!dev_out->dn_ptr)
 				continue;
-			if (dn_dev_islocal(dev_out, oldflp->fld_src))
-				break;
+			if (!dn_dev_islocal(dev_out, oldflp->fld_src))
+				continue;
+			if ((dev_out->flags & IFF_LOOPBACK) &&
+			    oldflp->fld_dst &&
+			    !dn_dev_islocal(dev_out, oldflp->fld_dst))
+				continue;
+			break;
 		}
 		read_unlock(&dev_base_lock);
 		if (dev_out == NULL)