rawmidi: return ENOTSUP when timestamp reads are not supported by plugins

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/rawmidi/rawmidi.c b/src/rawmidi/rawmidi.c
index 58557e577edab4877cff534c884eeb9788fefdc7..2ff3f6cfbdbe3e920b68a81f2839edccb1658d31 100644 (file)
--- a/src/rawmidi/rawmidi.c
+++ b/src/rawmidi/rawmidi.c
@@ -844,6 +844,8 @@ int snd_rawmidi_params_set_read_mode(const snd_rawmidi_t *rawmidi, snd_rawmidi_p
                framing = SNDRV_RAWMIDI_MODE_FRAMING_NONE;
                break;
        case SND_RAWMIDI_READ_TSTAMP:
+               if (rawmidi->ops->tread == NULL)
+                       return -ENOTSUP;
                framing = SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP;
                break;
        default:
@@ -1114,5 +1116,7 @@ ssize_t snd_rawmidi_tread(snd_rawmidi_t *rawmidi, struct timespec *tstamp, void
        assert(buffer || size == 0);
        if ((rawmidi->params_mode & SNDRV_RAWMIDI_MODE_FRAMING_MASK) == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP)
                return -EINVAL;
+       if (rawmidi->ops->tread == NULL)
+               return -ENOTSUP;
        return (rawmidi->ops->tread)(rawmidi, tstamp, buffer, size);
 }