From ed0b3ebbae4d3afd9f742613ed64444e4d04ae0a Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Mon, 2 Oct 2023 22:32:16 +0200
Subject: [PATCH] vhost-user: tighten "reply_supported" scope in
"set_vring_addr"
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In the vhost_user_set_vring_addr() function, we calculate
"reply_supported" unconditionally, even though we'll only need it if
"wait_for_reply" is also true.
Restrict the scope of "reply_supported" to the minimum.
This is purely refactoring -- no observable change.
Cc: "Michael S. Tsirkin" <mst@redhat.com> (supporter:vhost)
Cc: Eugenio Perez Martin <eperezma@redhat.com>
Cc: German Maglione <gmaglione@redhat.com>
Cc: Liu Jiang <gerry@linux.alibaba.com>
Cc: Sergio Lopez Pascual <slp@redhat.com>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Tested-by: Albert Esteve <aesteve@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20231002203221.17241-3-lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
hw/virtio/vhost-user.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 3e33a2e9e0..6c7b4cc75c 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -1321,17 +1321,18 @@ static int vhost_user_set_vring_addr(struct vhost_dev *dev,
.hdr.size = sizeof(msg.payload.addr),
};
- bool reply_supported = virtio_has_feature(dev->protocol_features,
- VHOST_USER_PROTOCOL_F_REPLY_ACK);
-
/*
* wait for a reply if logging is enabled to make sure
* backend is actually logging changes
*/
bool wait_for_reply = addr->flags & (1 << VHOST_VRING_F_LOG);
- if (reply_supported && wait_for_reply) {
- msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK;
+ if (wait_for_reply) {
+ bool reply_supported = virtio_has_feature(dev->protocol_features,
+ VHOST_USER_PROTOCOL_F_REPLY_ACK);
+ if (reply_supported) {
+ msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK;
+ }
}
ret = vhost_user_write(dev, &msg, NULL, 0);