commit 4bb3893908385836410346725dd9e584dcd24836
author Gerd Hoffmann <kraxel@redhat.com> Fri Sep 01 15:14:09 2017 +0200
committer Gerd Hoffmann <kraxel@redhat.com> Mon Sep 18 13:13:32 2017 +0200
tree 6ed326c9e1bbcf87e09958f1fd42db12672fc657
parent f75637badd76ae0f3bd51a128e1a2da0d2bb1d6b

wm8750: add record buffer underrun check

Reported-by: niuguoxiang@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170901131409.6712-1-kraxel@redhat.com

hw/audio/wm8750.c

diff --git a/hw/audio/wm8750.c b/hw/audio/wm8750.c
index f8b5beb..d2bf2e1 100644
--- a/hw/audio/wm8750.c
+++ b/hw/audio/wm8750.c
@@ -680,8 +680,12 @@
     WM8750State *s = (WM8750State *) opaque;
     uint32_t *data;
 
-    if (s->idx_in >= sizeof(s->data_in))
+    if (s->idx_in >= sizeof(s->data_in)) {
         wm8750_in_load(s);
+        if (s->idx_in >= sizeof(s->data_in)) {
+            return 0x80008000; /* silence in AUD_FMT_S16 sample format */
+        }
+    }
 
     data = (uint32_t *) &s->data_in[s->idx_in];
     s->req_in -= 4;