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authorTakashi Iwai <tiwai@suse.de>2016-10-25 15:56:35 +0200
committerTakashi Iwai <tiwai@suse.de>2016-10-25 16:00:46 +0200
commit9b50898ad96c793a8f7cde9d8f281596d752a7dd (patch)
tree5a352f4afed811ce33b0a8ea378c36b89df1b6a7 /sound
parent1a3f099101b85cc93d864eb030d97e7725c72ea7 (diff)
downloadlinux-aarch64-9b50898ad96c793a8f7cde9d8f281596d752a7dd.tar.gz
ALSA: seq: Fix time account regression
The recent rewrite of the sequencer time accounting using timespec64 in the commit [3915bf294652: ALSA: seq_timer: use monotonic times internally] introduced a bad regression. Namely, the time reported back doesn't increase but goes back and forth. The culprit was obvious: the delta is stored to the result (cur_time = delta), instead of adding the delta (cur_time += delta)! Let's fix it. Fixes: 3915bf294652 ('ALSA: seq_timer: use monotonic times internally') Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177571 Reported-by: Yves Guillemot <yc.guillemot@wanadoo.fr> Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/seq/seq_timer.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c
index dcc102813aef..37d9cfbc29f9 100644
--- a/sound/core/seq/seq_timer.c
+++ b/sound/core/seq/seq_timer.c
@@ -448,8 +448,8 @@ snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr)
ktime_get_ts64(&tm);
tm = timespec64_sub(tm, tmr->last_update);
- cur_time.tv_nsec = tm.tv_nsec;
- cur_time.tv_sec = tm.tv_sec;
+ cur_time.tv_nsec += tm.tv_nsec;
+ cur_time.tv_sec += tm.tv_sec;
snd_seq_sanity_real_time(&cur_time);
}
spin_unlock_irqrestore(&tmr->lock, flags);