From c4c0e64babacbb7bc3bf5dc279f4854d88425837 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 26 Mar 1991 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1991-03-26

---
 port/sysproc.c    |  3 ++-
 power/devhotrod.c | 24 ++++++++++++++----------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/port/sysproc.c b/port/sysproc.c
index 6bd9a861f4063702a5b0ff1ab59fa9e39a2dd01a..c18a7ffb433953d6944baad89a2ce455217307e6 100644
--- a/port/sysproc.c
+++ b/port/sysproc.c
@@ -474,7 +474,8 @@ sysforkpgrp(ulong *arg)
 long
 sysnotify(ulong *arg)
 {
-	validaddr(arg[0], sizeof(ulong), 0);
+	if(arg[0] != 0)
+		validaddr(arg[0], sizeof(ulong), 0);
 	u->notify = (int(*)(void*, char*))(arg[0]);
 	return 0;
 }
diff --git a/power/devhotrod.c b/power/devhotrod.c
index 2f3a6e1b6e99c18aae337286d408f5631ffc2773..2f3c803b8a27083241c1a2f8fe07acd0ec85ddb4 100644
--- a/power/devhotrod.c
+++ b/power/devhotrod.c
@@ -422,22 +422,26 @@ hotrodintr(int vec)
 {
 	Hotrod *h;
 	Hotmsg *hm;
+	ulong l;
 
 	h = &hotrod[vec - Vmevec];
-	if(h < hotrod || h > &hotrod[Nhotrod]){
+	if(h<hotrod || h>&hotrod[Nhotrod]){
 		print("bad hotrod vec\n");
 		return;
 	}
 	h->addr->lcsr3 &= ~INT_VME;
-	hm = (Hotmsg*)VME2MP(h->rq[h->ri]);
-	h->rq[h->ri] = 0;
-	h->ri++;
-	if(h->ri >= NRQ)
-		h->ri = 0;
-	hm->intr = 1;
-	if(hm->abort)
-		return;
-	wakeup(&hm->r);
+	while(l = h->rq[h->ri]){	/* assign = */
+		hm = (Hotmsg*)(VME2MP(l));
+		h->rq[h->ri] = 0;
+		h->ri++;
+		if(h->ri >= NRQ)
+			h->ri = 0;
+		hm->intr = 1;
+		if(hm->abort)
+			print("abort wakeup\n");
+		else
+			wakeup(&hm->r);
+	}
 }
 
 #ifdef	ENABMEMTEST