diff options
Diffstat (limited to 'sound/firewire/lib.c')
| -rw-r--r-- | sound/firewire/lib.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/firewire/lib.c b/sound/firewire/lib.c index edf1c8bd25a6..f80aafa44c89 100644 --- a/sound/firewire/lib.c +++ b/sound/firewire/lib.c @@ -74,7 +74,11 @@ static void async_midi_port_callback(struct fw_card *card, int rcode, struct snd_fw_async_midi_port *port = callback_data; struct snd_rawmidi_substream *substream = ACCESS_ONCE(port->substream); - if (rcode == RCODE_COMPLETE && substream != NULL) + /* This port is closed. */ + if (substream == NULL) + return; + + if (rcode == RCODE_COMPLETE) snd_rawmidi_transmit_ack(substream, port->consume_bytes); else if (!rcode_is_permanent_error(rcode)) /* To start next transaction immediately for recovery. */ |