Re: kern/60144: virtio(4) cache coherence issue

["Tetsuya Isaki via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/60144; it has been noted by GNATS.

From: Tetsuya Isaki <isaki%pastel-flower.jp@localhost>
To: Jason Thorpe <thorpej%me.com@localhost>, gnats-bugs%netbsd.org@localhost,
	kern-bug-people%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/60144: virtio(4) cache coherence issue
Date: Thu, 02 Apr 2026 21:00:50 +0900

 At Tue, 31 Mar 2026 06:46:34 -0700,
 Jason Thorpe wrote:
 > Please try:
 > 
 >     virt68k/virt68k/bus_dma.c:
 > 
 > $NetBSD: bus_dma.c,v 1.5 2026/03/31 13:45:00 thorpej Exp $
 
 The spurious interrupt issue still occurs with this bus_dma.c,v 1.5
 patch.  When I rewrote it as below, the issue didn't seem to occur.
 
 -       if (ops & BUS_DMASYNC_PREREAD) {
 +       if (ops & BUS_DMASYNC_POSTREAD) {
 
 By the way I've tested it on -11 branch.  (because virt68k-current has
 another issue.  I'll report once this issue is resolved)
 ---
 Tetsuya Isaki <isaki%pastel-flower.jp@localhost / isaki%NetBSD.org@localhost>