[src/trunk]: src/sys/rump/librump/rumpnet Schedule only those netisr's that h...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8143f0c2fb66
branches:  trunk
changeset: 327021:8143f0c2fb66
user:      pooka <pooka%NetBSD.org@localhost>
date:      Tue Feb 25 22:40:53 2014 +0000

description:
Schedule only those netisr's that have registered handlers.

diffstat:

 sys/rump/librump/rumpnet/netisr.c |  13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diffs (34 lines):

diff -r 6e7c7b0b3f1a -r 8143f0c2fb66 sys/rump/librump/rumpnet/netisr.c
--- a/sys/rump/librump/rumpnet/netisr.c Tue Feb 25 22:18:09 2014 +0000
+++ b/sys/rump/librump/rumpnet/netisr.c Tue Feb 25 22:40:53 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: netisr.c,v 1.7 2014/02/14 01:43:13 pooka Exp $ */
+/*     $NetBSD: netisr.c,v 1.8 2014/02/25 22:40:53 pooka Exp $ */
 
 /*
  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netisr.c,v 1.7 2014/02/14 01:43:13 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netisr.c,v 1.8 2014/02/25 22:40:53 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/intr.h>
@@ -42,7 +42,14 @@
 schednetisr(int isr)
 {
 
-       softint_schedule(netisrs[isr]);
+       /*
+        * Do not schedule a softint that is not registered.
+        * This might cause the inq to fill, but the one calling us
+        * should start dropping packets once the inq is full,
+        * so no big harm done.
+        */
+       if (__predict_true(netisrs[isr]))
+               softint_schedule(netisrs[isr]);
 }
 
 void