From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 22 Sep 2021 18:18:57 +0000 (+0200)
Subject: rawmidi: return ENOTSUP when timestamp reads are not supported by plugins
X-Git-Tag: v1.2.6~21
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=c578e80d6fcc6c2098f6985d29ba9d94e376f1dd;p=alsa-lib.git

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 58557e57..2ff3f6cf 100644
--- 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);
 }