diff options
| -rw-r--r-- | sound/drivers/mts64.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/drivers/mts64.c b/sound/drivers/mts64.c index b68e71ca7abd..7dceb1e1c3b4 100644 --- a/sound/drivers/mts64.c +++ b/sound/drivers/mts64.c @@ -830,6 +830,9 @@ static void snd_mts64_interrupt(void *private) u8 status, data; struct snd_rawmidi_substream *substream; + if (!mts) + return; + spin_lock(&mts->lock); ret = mts64_read(mts->pardev->port); data = ret & 0x00ff; |