From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 295BF19CD11; Thu, 25 Jul 2024 14:44:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721918693; cv=none; b=pXZZm583GNw1mdKc+YACJ1VqMgxWbSF5LWk4upKl30Z96PcrmPPMFKeWoSXyV2Matp/VsUEMajhbffa73KGH4HAOE66UB6a1lsBxYTQSpqC70OxaHoFZyLHMOBNv8GU7+5DBgFFkOXDOG0moBQwvGiRyYDqGL80Kbb9cPDcE2Lo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721918693; c=relaxed/simple; bh=OKxne6J4qoskQLiLC1uYZMftrOn6Qy1b0T1Cc8RRzRE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MAXhQ5LsLTbkgQ/lgNlV/bjAVHjqWaZ3gAEh5VHDsVmb5Syq4GDs/DUiaEBQAteS2dOtyk4OzkaJhRlPW25KraJjj1n12vY4BSUo1rLEr0FVqXP6wLOFgOvvtehK+JCOVolbRdmQYOWdgsJLuqyvnMuYrkjxWGxcYQmRPlnn7gI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jMvyAtlj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="jMvyAtlj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 762AFC116B1; Thu, 25 Jul 2024 14:44:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1721918692; bh=OKxne6J4qoskQLiLC1uYZMftrOn6Qy1b0T1Cc8RRzRE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jMvyAtljnpjgOD2WcBDlkgNY8ylz4kScNEtmRulwnGswIFsJRq7ek5xPEVSrr9FvW qQbyd2M7+GTmnVs+IZbbKyaZITtolQ3v5lUv0hVEaOGzjtxuSSvrbvYl7ql6CPAwma ikK4jIrhZVWnN3WKEmd07e4DAtgpOgPCvQEeKz/M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shengjiu Wang , Takashi Iwai Subject: [PATCH 6.1 11/13] ALSA: pcm_dmaengine: Dont synchronize DMA channel when DMA is paused Date: Thu, 25 Jul 2024 16:37:20 +0200 Message-ID: <20240725142728.466385861@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240725142728.029052310@linuxfoundation.org> References: <20240725142728.029052310@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shengjiu Wang commit 88e98af9f4b5b0d60c1fe7f7f2701b5467691e75 upstream. When suspended, the DMA channel may enter PAUSE state if dmaengine_pause() is supported by DMA. At this state, dmaengine_synchronize() should not be called, otherwise the DMA channel can't be resumed successfully. Fixes: e8343410ddf0 ("ALSA: dmaengine: Synchronize dma channel after drop()") Signed-off-by: Shengjiu Wang Cc: Link: https://patch.msgid.link/1721198693-27636-1-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/core/pcm_dmaengine.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -352,8 +352,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + struct dma_tx_state state; + enum dma_status status; - dmaengine_synchronize(prtd->dma_chan); + status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state); + if (status != DMA_PAUSED) + dmaengine_synchronize(prtd->dma_chan); return 0; }