Zebediah Figura : server: Do not signal write bits if there are write asyncs alerted.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bff228c198597f4a1c43432988a2d61f93df5bc9
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=bff228c198597f4a1c4343298...

Author: Zebediah Figura <zfigura(a)codeweavers.com>
Date:   Thu May  5 00:43:29 2022 -0500

server: Do not signal write bits if there are write asyncs alerted.

Asyncs which are alerted but not "waiting" may still fill the pipe, and we
shouldn't signal AFD_POLL_WRITE in that case.

Signed-off-by: Zebediah Figura <zfigura(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 server/sock.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/server/sock.c b/server/sock.c
index cb76765e495..aa62a03d699 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -1011,10 +1011,13 @@ static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
         event &= ~(POLLIN | POLLPRI);
     }
 
-    if (event & POLLOUT && async_waiting( &sock->write_q ))
+    if ((event & POLLOUT) && async_queued( &sock->write_q ))
     {
-        if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
-        async_wake_up( &sock->write_q, STATUS_ALERTED );
+        if (async_waiting( &sock->write_q ))
+        {
+            if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
+            async_wake_up( &sock->write_q, STATUS_ALERTED );
+        }
         event &= ~POLLOUT;
     }