From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19F19C433FF for ; Fri, 2 Aug 2019 13:26:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8A2221855 for ; Fri, 2 Aug 2019 13:26:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564752380; bh=GBkxAE6ZenMIaib6Hgv4wKxi80SCOK4Va/wOiXJWcHw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qG6VmhYVohIMcR/XFk+muooQwX95eRIUZxv9PapAsYzo3TQuXHcBXAYercbhXiByY SInGDFCFlZ6nd0ZK7Mt+OVSv6eOMDuuMgEmtbzahkQkVxrSCY9ZOmWSA4Rx28pdFUd IGbfED9aYqetyjgD9oxalIGWGs/6Qxj4qCmxO+GQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394548AbfHBN0S (ORCPT ); Fri, 2 Aug 2019 09:26:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:36972 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390272AbfHBN0N (ORCPT ); Fri, 2 Aug 2019 09:26:13 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F07E721841; Fri, 2 Aug 2019 13:26:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564752372; bh=GBkxAE6ZenMIaib6Hgv4wKxi80SCOK4Va/wOiXJWcHw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u2pY+Avtooi+fYB8aNiWFX62Kuf8XwV1BAgOISGd2rZvIzBAvwWCKLMk5s9cVhuU9 302+7AvBXvT1lq0gF1n8lfD8LV147YE7DFX3VDJl+GjAXeSXhfT+v5NKoAvdAqDMxj j7rNr/iRtcEbA/we6Wnbp6/dN/6uXdTaMOf9Awnc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Charles Keepax , Vinod Koul , Takashi Iwai , Sasha Levin Subject: [PATCH AUTOSEL 4.9 13/22] ALSA: compress: Be more restrictive about when a drain is allowed Date: Fri, 2 Aug 2019 09:25:37 -0400 Message-Id: <20190802132547.14517-13-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190802132547.14517-1-sashal@kernel.org> References: <20190802132547.14517-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Charles Keepax [ Upstream commit 3b8179944cb0dd53e5223996966746cdc8a60657 ] Draining makes little sense in the situation of hardware overrun, as the hardware will have consumed all its available samples. Additionally, draining whilst the stream is paused would presumably get stuck as no data is being consumed on the DSP side. Signed-off-by: Charles Keepax Acked-by: Vinod Koul Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/core/compress_offload.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index b4f1536b17cb5..2e2d184684911 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -812,7 +812,10 @@ static int snd_compr_drain(struct snd_compr_stream *stream) case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: case SNDRV_PCM_STATE_PREPARED: + case SNDRV_PCM_STATE_PAUSED: return -EPERM; + case SNDRV_PCM_STATE_XRUN: + return -EPIPE; default: break; } @@ -861,7 +864,10 @@ static int snd_compr_partial_drain(struct snd_compr_stream *stream) case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: case SNDRV_PCM_STATE_PREPARED: + case SNDRV_PCM_STATE_PAUSED: return -EPERM; + case SNDRV_PCM_STATE_XRUN: + return -EPIPE; default: break; } -- 2.20.1