[Qemu-stable] [PATCH 1/3] net: invoke callback when purging queue

[Michael S. Tsirkin]

devices rely on packet callbacks eventually running,
but we violate this rule whenever we purge the queue.
To fix, invoke callbacks on all packets on purge.
Set length to 0, this way callers can detect that
this happened and re-queue if necessary.

Cc: address@hidden
Cc: Jason Wang <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
 net/queue.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/queue.c b/net/queue.c
index 859d02a..f948318 100644
--- a/net/queue.c
+++ b/net/queue.c
@@ -233,6 +233,9 @@ void qemu_net_queue_purge(NetQueue *queue, NetClientState 
*from)
         if (packet->sender == from) {
             QTAILQ_REMOVE(&queue->packets, packet, entry);
             queue->nq_count--;
+            if (packet->sent_cb) {
+                packet->sent_cb(packet->sender, 0);
+            }
             g_free(packet);
         }
     }
-- 
MST