[src/netbsd-8]: src/sys/dev/hyperv Pull up following revision(s) (requested b...

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

details:   https://anonhg.NetBSD.org/src/rev/94b26165bd0e
branches:  netbsd-8
changeset: 852426:94b26165bd0e
user:      martin <martin%NetBSD.org@localhost>
date:      Tue Jul 09 15:16:45 2019 +0000

description:
Pull up following revision(s) (requested by nakayama in ticket #1286):

        sys/dev/hyperv/vmbus.c: revision 1.4

Zero clear the allocated ring buffer for vmbus_channel.
This change makes Hyper-V's vmbus devices work properly even after reboot.

diffstat:

 sys/dev/hyperv/vmbus.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r d39739dd4a75 -r 94b26165bd0e sys/dev/hyperv/vmbus.c
--- a/sys/dev/hyperv/vmbus.c    Mon Jul 08 16:31:54 2019 +0000
+++ b/sys/dev/hyperv/vmbus.c    Tue Jul 09 15:16:45 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vmbus.c,v 1.2.2.3 2019/06/12 10:17:32 martin Exp $     */
+/*     $NetBSD: vmbus.c,v 1.2.2.4 2019/07/09 15:16:45 martin Exp $     */
 /*     $OpenBSD: hyperv.c,v 1.43 2017/06/27 13:56:15 mikeb Exp $       */
 
 /*-
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vmbus.c,v 1.2.2.3 2019/06/12 10:17:32 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vmbus.c,v 1.2.2.4 2019/07/09 15:16:45 martin Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1263,6 +1263,7 @@
                    "failed to allocate channel ring\n");
                return ENOMEM;
        }
+       memset(ch->ch_ring, 0, ch->ch_ring_size);
 
        memset(&ch->ch_wrd, 0, sizeof(ch->ch_wrd));
        ch->ch_wrd.rd_ring = (struct vmbus_bufring *)ch->ch_ring;