red_channel: Use the channel core to remove the stream watch on disconnect

We allow channels to have different core implementations, but we were
relying on reds_stream_free to remove the stream watch on disconnect,
and reds_stream_free always uses the qemu core implementation.

So far we were getting away with this since all the alternative core
implementations always return NULL from watch_add.

But:
1) The code before this patch clearly was not correct, since it was matching
   a channel-core watch_add with a qemu-core watch_remove
2) I plan to move red_worker over to actually using an alternative watch
   implementation at which point this becomes a real problem

Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/server/red_channel.c b/server/red_channel.c
index 13cc5251..5f906e6b 100644
--- a/server/red_channel.c
+++ b/server/red_channel.c
@@ -1194,6 +1194,10 @@ void red_channel_client_disconnect(RedChannelClient *rcc)
     if (rcc->channel->channel_cbs.pre_disconnect) {
         rcc->channel->channel_cbs.pre_disconnect(rcc);
     }
+    if (rcc->stream->watch) {
+        rcc->channel->core->watch_remove(rcc->stream->watch);
+        rcc->stream->watch = NULL;
+    }
     reds_stream_free(rcc->stream);
     rcc->stream = NULL;
     red_channel_remove_client(rcc);