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From 1e3faef7048c8d36c9e3f004c7e08d96b30d055f Mon Sep 17 00:00:00 2001
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From: Si-Wei Liu <si-wei.liu@oracle.com>
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Date: Fri, 6 May 2022 19:28:15 -0700
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Subject: [PATCH 4/7] vhost-net: fix improper cleanup in vhost_net_start
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Cindy Lu <lulu@redhat.com>
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RH-MergeRequest: 204: vdpa :sync the Multiqueue fixes for vhost-vDPA
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RH-Commit: [4/7] 31575b626fd5b381a4640e4f2608033bb141dc62
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RH-Bugzilla: 2095795
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
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RH-Acked-by: Jason Wang <jasowang@redhat.com>
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vhost_net_start() missed a corresponding stop_one() upon error from
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vhost_set_vring_enable(). While at it, make the error handling for
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err_start more robust. No real issue was found due to this though.
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Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Message-Id: <1651890498-24478-5-git-send-email-si-wei.liu@oracle.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 6f3910b5eee00b8cc959e94659c0d524c482a418)
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Signed-off-by: Cindy Lu <lulu@redhat.com>
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---
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hw/net/vhost_net.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
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index 30379d2ca4..d6d7c51f62 100644
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--- a/hw/net/vhost_net.c
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+++ b/hw/net/vhost_net.c
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@@ -381,6 +381,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
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r = vhost_set_vring_enable(peer, peer->vring_enable);
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if (r < 0) {
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+ vhost_net_stop_one(get_vhost_net(peer), dev);
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goto err_start;
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}
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}
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@@ -390,7 +391,8 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
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err_start:
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while (--i >= 0) {
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- peer = qemu_get_peer(ncs , i);
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+ peer = qemu_get_peer(ncs, i < data_queue_pairs ?
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+ i : n->max_queue_pairs);
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vhost_net_stop_one(get_vhost_net(peer), dev);
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}
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e = k->set_guest_notifiers(qbus->parent, total_notifiers, false);
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--
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2.31.1
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