diff mbox series

[v2,3/6] virtio-net: Do not check for the queue before RSS

Message ID 20241111-queue-v2-3-2f7883a1004f@daynix.com (mailing list archive)
State New
Headers show
Series virtio-net fixes | expand

Commit Message

Akihiko Odaki Nov. 11, 2024, 6:40 a.m. UTC 
virtio_net_can_receive() checks if the queue is ready, but RSS will
change the queue to use so, strictly speaking, we may still be able to
receive the packet even if the queue initially provided is not ready.
Perform RSS before virtio_net_can_receive() to cover such a case.

Fixes: 4474e37a5b3a ("virtio-net: implement RX RSS processing")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 hw/net/virtio-net.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 62e396e8d2fd..abbb22e40f9f 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1906,10 +1906,6 @@  static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
     size_t offset, i, guest_offset, j;
     ssize_t err;
 
-    if (!virtio_net_can_receive(nc)) {
-        return -1;
-    }
-
     if (!no_rss && n->rss_data.enabled && n->rss_data.enabled_software_rss) {
         int index = virtio_net_process_rss(nc, buf, size, &extra_hdr);
         if (index >= 0) {
@@ -1919,6 +1915,10 @@  static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
         }
     }
 
+    if (!virtio_net_can_receive(nc)) {
+        return -1;
+    }
+
     /* hdr_len refers to the header we supply to the guest */
     if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
         return 0;