This is another preliminary patch for USB MIDI 2.0 gadget driver. Add a new flag, no_process_stream, to snd_ump for suppressing the UMP Stream message handling in UMP core.
Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/ump.h | 1 + sound/core/ump.c | 4 ++++ 2 files changed, 5 insertions(+)
diff --git a/include/sound/ump.h b/include/sound/ump.h index 3c7e67475676..2f6a9944c6ef 100644 --- a/include/sound/ump.h +++ b/include/sound/ump.h @@ -28,6 +28,7 @@ struct snd_ump_endpoint { u32 stream_wait_for; /* expected stream message status */ bool stream_finished; /* set when message has been processed */ bool parsed; /* UMP / FB parse finished? */ + bool no_process_stream; /* suppress UMP stream messages handling */ wait_queue_head_t stream_wait; struct snd_rawmidi_file stream_rfile;
diff --git a/sound/core/ump.c b/sound/core/ump.c index 4150b9c0b35b..5e73c9cf5919 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -854,6 +854,10 @@ static void ump_handle_stream_msg(struct snd_ump_endpoint *ump, unsigned int status; int ret;
+ /* UMP stream message suppressed (for gadget UMP)? */ + if (ump->no_process_stream) + return; + BUILD_BUG_ON(sizeof(*msg) != 16); ump_dbg(ump, "Stream msg: %08x %08x %08x %08x\n", buf[0], buf[1], buf[2], buf[3]);