Re: [PATCH] coreaudio: Always return 0 in handle_voice_change

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Sonntag, 6. März 2022 07:39:49 CET Akihiko Odaki wrote:
> MacOSX.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/AudioHardwa
> re.h
> says:
> > The return value is currently unused and should always be 0.

Where does it say that, about which macOS functions? There are quite a bunch 
of macOS functions involved in init_out_device(), and they all have error 
pathes in init_out_device(), and they still will have them after this patch.

And again, I'm missing: this as an improvement because? Is this a user 
invisible improvement (e.g. removing redundant branches), or is this a user 
visible improvement, i.e. does it fix a misbehaviour? In case of the latter, 
which misbehaviour did you encounter?

Best regards,
Christian Schoenebeck

> 
> Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
> ---
>  audio/coreaudio.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/audio/coreaudio.c b/audio/coreaudio.c
> index 0f19d0ce01c..91445096358 100644
> --- a/audio/coreaudio.c
> +++ b/audio/coreaudio.c
> @@ -540,7 +540,6 @@ static OSStatus handle_voice_change(
>      const AudioObjectPropertyAddress *in_addresses,
>      void *in_client_data)
>  {
> -    OSStatus status;
>      coreaudioVoiceOut *core = in_client_data;
> 
>      qemu_mutex_lock_iothread();
> @@ -549,13 +548,12 @@ static OSStatus handle_voice_change(
>          fini_out_device(core);
>      }
> 
> -    status = init_out_device(core);
> -    if (!status) {
> +    if (!init_out_device(core)) {
>          update_device_playback_state(core);
>      }
> 
>      qemu_mutex_unlock_iothread();
> -    return status;
> +    return 0;
>  }
> 
>  static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,