From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933954AbdKGA0f (ORCPT ); Mon, 6 Nov 2017 19:26:35 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:53919 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933911AbdKGA0a (ORCPT ); Mon, 6 Nov 2017 19:26:30 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Mark Brown" , "Banajit Goswami" , "Patrick Lai" , "Gopikrishnaiah Anandan" Date: Mon, 06 Nov 2017 23:03:02 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 025/294] ASoC: do not close shared backend dailink In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.50-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Banajit Goswami commit b1cd2e34c69a2f3988786af451b6e17967c293a0 upstream. Multiple frontend dailinks may be connected to a backend dailink at the same time. When one of frontend dailinks is closed, the associated backend dailink should not be closed if it is connected to other active frontend dailinks. Change ensures that backend dailink is closed only after all connected frontend dailinks are closed. Signed-off-by: Gopikrishnaiah Anandan Signed-off-by: Banajit Goswami Signed-off-by: Patrick Lai Signed-off-by: Mark Brown Signed-off-by: Ben Hutchings --- sound/soc/soc-pcm.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -150,6 +150,10 @@ int dpcm_dapm_stream_event(struct snd_so dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", be->dai_link->name, event, dir); + if ((event == SND_SOC_DAPM_STREAM_STOP) && + (be->dpcm[dir].users >= 1)) + continue; + snd_soc_dapm_stream_event(be, dir, event); }