hw/audio/hda: fix memory leak on audio setup

When SET_STREAM_FORMAT is called, we should clear the existing setup.

Factor out common function to close a stream.

Direct leak of 144 byte(s) in 3 object(s) allocated from:
    #0 0x7f91d38f7350 in calloc (/lib64/libasan.so.8+0xf7350) (BuildId: a4ad7eb954b390cf00f07fa10952988a41d9fc7a)
    #1 0x7f91d2ab7871 in g_malloc0 (/lib64/libglib-2.0.so.0+0x64871) (BuildId: 36b60dbd02e796145a982d0151ce37202ec05649)
    #2 0x562fa2f447ee in timer_new_full /home/elmarco/src/qemu/include/qemu/timer.h:538
    #3 0x562fa2f4486f in timer_new /home/elmarco/src/qemu/include/qemu/timer.h:559
    #4 0x562fa2f448a9 in timer_new_ns /home/elmarco/src/qemu/include/qemu/timer.h:577
    #5 0x562fa2f47955 in hda_audio_setup ../hw/audio/hda-codec.c:490
    #6 0x562fa2f4897e in hda_audio_command ../hw/audio/hda-codec.c:605

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-ID: <20241008125028.1177932-3-marcandre.lureau@redhat.com>
(cherry picked from commit 6d6e23361fc732e4fe36a8bc5873b85f264ed53a)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/audio/hda-codec.c

@@ -472,6 +472,24 @@ static void hda_audio_set_amp(HDAAudioStream *st)
     }
 }
 
+static void hda_close_stream(HDAAudioState *a, HDAAudioStream *st)
+{
+    if (st->node == NULL) {
+        return;
+    }
+    if (a->use_timer) {
+        timer_free(st->buft);
+        st->buft = NULL;
+    }
+    if (st->output) {
+        AUD_close_out(&a->card, st->voice.out);
+        st->voice.out = NULL;
+    } else {
+        AUD_close_in(&a->card, st->voice.in);
+        st->voice.in = NULL;
+    }
+}
+
 static void hda_audio_setup(HDAAudioStream *st)
 {
     bool use_timer = st->state->use_timer;
@@ -484,6 +502,7 @@ static void hda_audio_setup(HDAAudioStream *st)
     trace_hda_audio_format(st->node->name, st->as.nchannels,
                            fmt2name[st->as.fmt], st->as.freq);
 
+    hda_close_stream(st->state, st);
     if (st->output) {
         if (use_timer) {
             cb = hda_audio_output_cb;
@@ -741,23 +760,11 @@ static void hda_audio_init(HDACodecDevice *hda,
 static void hda_audio_exit(HDACodecDevice *hda)
 {
     HDAAudioState *a = HDA_AUDIO(hda);
-    HDAAudioStream *st;
     int i;
 
     dprint(a, 1, "%s\n", __func__);
     for (i = 0; i < ARRAY_SIZE(a->st); i++) {
-        st = a->st + i;
-        if (st->node == NULL) {
-            continue;
-        }
-        if (a->use_timer) {
-            timer_free(st->buft);
-        }
-        if (st->output) {
-            AUD_close_out(&a->card, st->voice.out);
-        } else {
-            AUD_close_in(&a->card, st->voice.in);
-        }
+        hda_close_stream(a, a->st + i);
     }
     AUD_remove_card(&a->card);
 }