[PATCH v5 3/7] vdpa: Check device ack in vhost_vdpa_net_load_rx_mode()

[Hawkins Jiawei]

Considering that vhost_vdpa_net_load_rx_mode() is only called
within vhost_vdpa_net_load_rx() now, this patch refactors
vhost_vdpa_net_load_rx_mode() to include a check for the
device's ack, simplifying the code and improving its maintainability.

Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
---
v5:
  - no change

v4: 
https://lore.kernel.org/all/be0e39e2c76e1ef39a76839b4a4ce90c8e54a98e.1693287885.git.yin31149@gmail.com/

 net/vhost-vdpa.c | 76 ++++++++++++++++++++----------------------------
 1 file changed, 31 insertions(+), 45 deletions(-)

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 86b8d31244..36a4e57c0d 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -827,14 +827,24 @@ static int vhost_vdpa_net_load_rx_mode(VhostVDPAState *s,
         .iov_base = &on,
         .iov_len = sizeof(on),
     };
-    return vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_RX,
-                                   cmd, &data, 1);
+    ssize_t dev_written;
+
+    dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_RX,
+                                          cmd, &data, 1);
+    if (unlikely(dev_written < 0)) {
+        return dev_written;
+    }
+    if (*s->status != VIRTIO_NET_OK) {
+        return -EIO;
+    }
+
+    return 0;
 }
 
 static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
                                   const VirtIONet *n)
 {
-    ssize_t dev_written;
+    ssize_t r;
 
     if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX)) {
         return 0;
@@ -859,13 +869,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (!n->mac_table.uni_overflow && !n->promisc) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_PROMISC, 0);
-        if (unlikely(dev_written < 0)) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_PROMISC, 0);
+        if (unlikely(r < 0)) {
+            return r;
         }
     }
 
@@ -887,13 +893,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (n->mac_table.multi_overflow || n->allmulti) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_ALLMULTI, 1);
-        if (unlikely(dev_written < 0)) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_ALLMULTI, 1);
+        if (unlikely(r < 0)) {
+            return r;
         }
     }
 
@@ -912,13 +914,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (n->alluni) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_ALLUNI, 1);
-        if (dev_written < 0) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_ALLUNI, 1);
+        if (r < 0) {
+            return r;
         }
     }
 
@@ -933,13 +931,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (n->nomulti) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_NOMULTI, 1);
-        if (dev_written < 0) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_NOMULTI, 1);
+        if (r < 0) {
+            return r;
         }
     }
 
@@ -954,13 +948,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (n->nouni) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_NOUNI, 1);
-        if (dev_written < 0) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_NOUNI, 1);
+        if (r < 0) {
+            return r;
         }
     }
 
@@ -975,13 +965,9 @@ static int vhost_vdpa_net_load_rx(VhostVDPAState *s,
      * configuration only at live migration.
      */
     if (n->nobcast) {
-        dev_written = vhost_vdpa_net_load_rx_mode(s,
-                                            VIRTIO_NET_CTRL_RX_NOBCAST, 1);
-        if (dev_written < 0) {
-            return dev_written;
-        }
-        if (*s->status != VIRTIO_NET_OK) {
-            return -EIO;
+        r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_NOBCAST, 1);
+        if (r < 0) {
+            return r;
         }
     }
 
-- 
2.25.1