[ALSA] seq-midi - silently ignore non-MIDI events
ALSA sequencer
When non-MIDI sequencer events are sent to a RawMIDI port, silently
ignore them instead of returning a confusing error code which may upset
the sequencer and abort the current write() to /dev/snd/seq.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
index 57be915..4374829 100644
--- a/sound/core/seq/seq_midi.c
+++ b/sound/core/seq/seq_midi.c
@@ -134,7 +134,7 @@
seq_midisynth_t *msynth = (seq_midisynth_t *) private_data;
unsigned char msg[10]; /* buffer for constructing midi messages */
snd_rawmidi_substream_t *substream;
- int res;
+ int len;
snd_assert(msynth != NULL, return -EINVAL);
substream = msynth->output_rfile.output;
@@ -146,20 +146,16 @@
snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags);
return 0;
}
- res = snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream);
+ snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream);
snd_midi_event_reset_decode(msynth->parser);
- if (res < 0)
- return res;
} else {
if (msynth->parser == NULL)
return -EIO;
- res = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev);
- if (res < 0)
- return res;
- if ((res = dump_midi(substream, msg, res)) < 0) {
+ len = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev);
+ if (len < 0)
+ return 0;
+ if (dump_midi(substream, msg, len) < 0)
snd_midi_event_reset_decode(msynth->parser);
- return res;
- }
}
return 0;
}