Zebediah Figura : quartz/dsoundrender: Don't drop stream_cs in DSoundRender_SendSampleData().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: cf366488f6076859fdbd75a3570711ea51c0cc21
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=cf366488f6076859fdbd75a3570711ea51c0cc21

Author: Zebediah Figura <z.figura12 at gmail.com>
Date:   Mon Nov 30 23:51:34 2020 -0600

quartz/dsoundrender: Don't drop stream_cs in DSoundRender_SendSampleData().

We don't grab stream_cs to change any variables checked here, except to reset
flush_event, and that cannot result in a deadlock.

The only possible deadlocks here are:

(1) between this function and EndOfStream(), which is correct, as the two
    should presumably be serialized;

(2) between this function and EndFlush(); however, in that case we expect
    BeginFlush() first, which will unblock the streaming thread.

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/quartz/dsoundrender.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/dlls/quartz/dsoundrender.c b/dlls/quartz/dsoundrender.c
index 98ff21c0da1..099af2c4e21 100644
--- a/dlls/quartz/dsoundrender.c
+++ b/dlls/quartz/dsoundrender.c
@@ -257,9 +257,7 @@ static HRESULT DSoundRender_SendSampleData(struct dsound_render *This,
             hr = S_FALSE;
 
         if (hr != S_OK) {
-            LeaveCriticalSection(&This->stream_cs);
             ret = WaitForSingleObject(This->flush_event, 10);
-            EnterCriticalSection(&This->stream_cs);
             if (This->sink.flushing || This->filter.state == State_Stopped)
                 return This->filter.state == State_Paused ? S_OK : VFW_E_WRONG_STATE;
             if (ret != WAIT_TIMEOUT)