tap: make set_offload a nop after netdev cleanup
virtio-net expects set_offload to succeed after
peer cleanup.
Since we don't have an open fd anymore, make it so.
Fixes warning about the failure of offload setting.
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/net/tap.c b/net/tap.c
index 937d942..eada34a 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -269,8 +269,11 @@
int tso6, int ecn, int ufo)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ if (s->fd < 0) {
+ return;
+ }
- return tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo);
+ tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo);
}
static void tap_cleanup(VLANClientState *nc)
@@ -290,6 +293,7 @@
tap_read_poll(s, 0);
tap_write_poll(s, 0);
close(s->fd);
+ s->fd = -1;
}
static void tap_poll(VLANClientState *nc, bool enable)
