From 3f55d12df35552ae948587a62d6f9015664adc13 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
Date: Wed, 21 Dec 2022 12:50:12 +0100
Subject: [PATCH 1/9] virtio_net: Modify virtio_net_get_config to early return
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
RH-MergeRequest: 137: vDPA net SVQ guest announce support
RH-Bugzilla: 2141088
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Acked-by: Cindy Lu <lulu@redhat.com>
RH-Acked-by: Jason Wang <jasowang@redhat.com>
RH-Commit: [1/4] 4f5e79afd54e157f32e6fff56ae33e2b71492525 (eperezmartin/qemu-kvm)
Next patches introduce more code on vhost-vdpa branch, with already have
too much indentation.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221221115015.1400889-2-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit ebc141a62508dc91901373c1a19fe7e2cf560dfb)
---
hw/net/virtio-net.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index ec974f7a76..5935e55653 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -168,20 +168,22 @@ static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
ret = vhost_net_get_config(get_vhost_net(nc->peer), (uint8_t *)&netcfg,
n->config_size);
- if (ret != -1) {
- /*
- * Some NIC/kernel combinations present 0 as the mac address. As
- * that is not a legal address, try to proceed with the
- * address from the QEMU command line in the hope that the
- * address has been configured correctly elsewhere - just not
- * reported by the device.
- */
- if (memcmp(&netcfg.mac, &zero, sizeof(zero)) == 0) {
- info_report("Zero hardware mac address detected. Ignoring.");
- memcpy(netcfg.mac, n->mac, ETH_ALEN);
- }
- memcpy(config, &netcfg, n->config_size);
+ if (ret == -1) {
+ return;
}
+
+ /*
+ * Some NIC/kernel combinations present 0 as the mac address. As that
+ * is not a legal address, try to proceed with the address from the
+ * QEMU command line in the hope that the address has been configured
+ * correctly elsewhere - just not reported by the device.
+ */
+ if (memcmp(&netcfg.mac, &zero, sizeof(zero)) == 0) {
+ info_report("Zero hardware mac address detected. Ignoring.");
+ memcpy(netcfg.mac, n->mac, ETH_ALEN);
+ }
+
+ memcpy(config, &netcfg, n->config_size);
}
}
--
2.31.1