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 855E7155351; Tue, 23 Jul 2024 18:34:40 +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=1721759680; cv=none; b=gDfzB1aqQJ+SqQJLmFpOT+J50iCUPOOuG3tWBL+hAoLvIf35JyfFNssDcuC+JKmfdQsOuCce2grdFf7KjYr32DLs5NFggOtRgYi7uXVi0smtBXWpUpHk+2fWOUhjvd8IPGVmha7ObOTOGylZUAoUQrMPk0tFTG1cNwBer8LCtfY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721759680; c=relaxed/simple; bh=Gmo9vaGQGcymIBeD+oFghrpKbQXizMwmEJcMfzwFgZ8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oqAkRz4jL5ga5Ogzl+Z2+SLwBN6mpltbRNEnHEAl3iMHIyjM9PJGnYA4cN5u9dXOPdojMYhYRW2J7jdulQGL7YOYr/gSEi3gDkIRMFJi/nUgrgJZG51DoiJ+RIB3s0rh7Knx83vYgPeolzRqCsy0DKa+WGdMtHoV1AznEAN6UA8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=w7iX+CHS; 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="w7iX+CHS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B37F4C4AF09; Tue, 23 Jul 2024 18:34:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1721759680; bh=Gmo9vaGQGcymIBeD+oFghrpKbQXizMwmEJcMfzwFgZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w7iX+CHSl9neMdT0JwPcpwrdnd4lxtOALgxX1l5dWkEV+bMg5Ch/LIueoaf7/ftqS k58wswadahidky6m2rOm1ohd0BTDditj8APlumPr7Ocd15+aHIrPcLiW3J7kx1EY3w ZZbVfhTjhpXGgrFZsIoYPTAOHz6mzH79camwtt9c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shengjiu Wang , Takashi Iwai , Sasha Levin Subject: [PATCH 6.6 090/129] ALSA: dmaengine_pcm: terminate dmaengine before synchronize Date: Tue, 23 Jul 2024 20:23:58 +0200 Message-ID: <20240723180408.263226673@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240723180404.759900207@linuxfoundation.org> References: <20240723180404.759900207@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shengjiu Wang [ Upstream commit 6a7db25aad8ce6512b366d2ce1d0e60bac00a09d ] When dmaengine supports pause function, in suspend state, dmaengine_pause() is called instead of dmaengine_terminate_async(), In end of playback stream, the runtime->state will go to SNDRV_PCM_STATE_DRAINING, if system suspend & resume happen at this time, application will not resume playback stream, the stream will be closed directly, the dmaengine_terminate_async() will not be called before the dmaengine_synchronize(), which violates the call sequence for dmaengine_synchronize(). This behavior also happens for capture streams, but there is no SNDRV_PCM_STATE_DRAINING state for capture. So use dmaengine_tx_status() to check the DMA status if the status is DMA_PAUSED, then call dmaengine_terminate_async() to terminate dmaengine before dmaengine_synchronize(). Signed-off-by: Shengjiu Wang Link: https://patch.msgid.link/1718851218-27803-1-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/core/pcm_dmaengine.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index d142609570347..e299e8634751f 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -368,6 +368,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_sync_stop); int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + struct dma_tx_state state; + enum dma_status status; + + status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state); + if (status == DMA_PAUSED) + dmaengine_terminate_async(prtd->dma_chan); dmaengine_synchronize(prtd->dma_chan); kfree(prtd); @@ -388,6 +394,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close); int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + struct dma_tx_state state; + enum dma_status status; + + status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state); + if (status == DMA_PAUSED) + dmaengine_terminate_async(prtd->dma_chan); dmaengine_synchronize(prtd->dma_chan); dma_release_channel(prtd->dma_chan); -- 2.43.0