From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 22 Sep 2021 11:16:54 +0000 (+0200)
Subject: rawmidi: allow timestamp reads only for the appropriate read mode
X-Git-Tag: v1.2.6~22
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=5ac619837698cc7edb80d7d8dd41b7ab3e05b113;p=alsa-lib.git

rawmidi: allow timestamp reads only for the appropriate read mode

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

diff --git a/src/rawmidi/rawmidi.c b/src/rawmidi/rawmidi.c
index 9fab63f1..58557e57 100644
--- a/src/rawmidi/rawmidi.c
+++ b/src/rawmidi/rawmidi.c
@@ -1112,5 +1112,7 @@ ssize_t snd_rawmidi_tread(snd_rawmidi_t *rawmidi, struct timespec *tstamp, void
 	assert(rawmidi);
 	assert(rawmidi->stream == SND_RAWMIDI_STREAM_INPUT);
 	assert(buffer || size == 0);
+	if ((rawmidi->params_mode & SNDRV_RAWMIDI_MODE_FRAMING_MASK) == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP)
+		return -EINVAL;
 	return (rawmidi->ops->tread)(rawmidi, tstamp, buffer, size);
 }