diff mbox series

[3/3] virtio-net: virtio_net_flush_tx() check for per-queue reset

Message ID 20230128071724.33677-4-xuanzhuo@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series virtio: fix for assertion failure: virtio_net_get_subqueue(nc)->async_tx.elem failed | expand

Commit Message

Xuan Zhuo Jan. 28, 2023, 7:17 a.m. UTC 
Check whether it is per-queue reset state in virtio_net_flush_tx().

Before per-queue reset, we need to recover async tx resources. At this
time, virtio_net_flush_tx() is called, but we should not try to send
new packets, so virtio_net_flush_tx() should check the current
per-queue reset state.

Fixes: 7dc6be52 ("virtio-net: support queue reset")
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1451
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
 hw/net/virtio-net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 3ae909041a..e7e651e915 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -2627,7 +2627,7 @@  static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
     VirtQueueElement *elem;
     int32_t num_packets = 0;
     int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
-    if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
+    if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) || q->tx_vq->reset) {
         return num_packets;
     }