[ALSA] seq_midi_event: prevent running status after system messages

Reset the event type after encoding a system message to prevent any
following data bytes from being interpreted as data for a running status
system message, which is not allowed in MIDI.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c
index cb38ff33f628..45ba6fc4646a 100644
--- a/sound/core/seq/seq_midi_event.c
+++ b/sound/core/seq/seq_midi_event.c
@@ -283,6 +283,8 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
                 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
                 if (status_event[dev->type].encode) /* set data values */
                         status_event[dev->type].encode(dev, ev);
+                if (dev->type >= ST_SPECIAL)
+                        dev->type = ST_INVALID;
                 rc = 1;
         } else  if (dev->type == ST_SYSEX) {
                 if (c == MIDI_CMD_COMMON_SYSEX_END ||