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playlist: fix deadlock when calling playlist_restore() on certain timing

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for example:
<audio> audio_thread
<audio> -audio_playback_handler
<audio> --audio_start_playback
<audio> ---audio_fill_file_buffer
<audio> ----playlist_peek
<main>  -playlist_resume { playlist_write_lock(playlist) }
<main>  --alloc_tempbuf
<main>  ---core_alloc_ex
<main>  ----buflib_alloc_ex
<main>  -----buflib_compact_and_shrink
<main>  ------playback.c:shrink_callback
<main>  -------audio_queue_send(Q_AUDIO_STOP)
<main>  (waiting for audio queue reply)
<audio> -----get_track_filename { playlist_write_lock(playlist) }
<audio> (waiting for playlist lock)

resolve this by not locking playlist until temporary buffer is allocated

Change-Id: I55a856780d17455b13e2515e096095ae0e9c86c2
This commit is contained in:
mojyack 2025-12-16 04:27:43 +09:00
parent ef47ffe250
commit 3892773bd7
1 changed files with 3 additions and 2 deletions
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5
apps/playlist.c
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@ -3159,7 +3159,6 @@ int playlist_resume(void)
struct playlist_info* playlist = &current_playlist;
dc_thread_stop(playlist);
playlist_write_lock(playlist);
if (core_allocatable() < (1 << 10))
talk_buffer_set_policy(TALK_BUFFER_LOOSE); /* back off voice buffer */
@ -3172,9 +3171,11 @@ int playlist_resume(void)
if (handle < 0)
{
splashf(HZ * 2, "%s(): OOM", __func__);
goto out;
return -1;
}
playlist_write_lock(playlist);
/* align buffer for faster load times */
buffer = core_get_data(handle);
STORAGE_ALIGN_BUFFER(buffer, buflen);