From: Tedd Ho-Jeong An <tedd.an@intel.com>
Date: Fri, 19 Jun 2020 18:34:56 +0000 (-0700)
Subject: midi: Fix random empty timestamp_high value
X-Git-Tag: submit/tizen/20210606.232858~66
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ba48aaabfa497560aeae97ef54c078ab4ed32549;p=platform%2Fupstream%2Fbluez.git

midi: Fix random empty timestamp_high value

The timestamp_high value is assigned from the monotonic time but there
is a chance that the value becomes zero because it reads the value
between bit8 and bit13.

This patch makes sure the timestamp_high value get a non-zero value.

Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>
---

diff --git a/profiles/midi/libmidi.c b/profiles/midi/libmidi.c
index 18506c69..cd25992a 100644
--- a/profiles/midi/libmidi.c
+++ b/profiles/midi/libmidi.c
@@ -77,8 +77,13 @@ inline static void append_timestamp_high_maybe(struct midi_write_parser *parser)
 	if (midi_write_has_data(parser))
 		return;
 
-	parser->rtime = g_get_monotonic_time() / 1000; /* convert µs to ms */
-	timestamp_high |= (parser->rtime & 0x1F80) >> 7;
+	/* Make sure timesampt_high is assigned a non-zero value */
+	do {
+		/* convert µs to ms */
+		parser->rtime = g_get_monotonic_time() / 1000;
+		timestamp_high |= (parser->rtime & 0x1F80) >> 7;
+	} while (timestamp_high == 0x80);
+
 	/* set timestampHigh */
 	buffer_append_byte(&parser->midi_stream, timestamp_high);
 }