[PATCH] ASoC: SOF: amd: Add support for IPC with a reply_size set to zero

From: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
To: <broonie@kernel.org>, <alsa-devel@alsa-project.org>
Cc: <vsujithkumar.reddy@amd.com>, <Vijendar.Mukunda@amd.com>,
	<Basavaraj.Hiregoudar@amd.com>, <Sunil-kumar.Dommati@amd.com>,
	<syed.sabakareem@amd.com>, <mastan.katragadda@amd.com>,
	<arungopal.kondaveeti@amd.com>,
	Venkata Prasad Potturu <venkataprasad.potturu@amd.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>,
	Bard Liao <yung-chuan.liao@linux.intel.com>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Daniel Baluta <daniel.baluta@nxp.com>,
	Kai Vehmanen <kai.vehmanen@linux.intel.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	V sujith kumar Reddy <Vsujithkumar.Reddy@amd.com>,
	Iuliana Prodan <iuliana.prodan@nxp.com>,
	"Ajit Kumar Pandey" <AjitKumar.Pandey@amd.com>,
	"moderated list:SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS" 
	<sound-open-firmware@alsa-project.org>,
	open list <linux-kernel@vger.kernel.org>
Subject: [PATCH] ASoC: SOF: amd: Add support for IPC with a reply_size set to zero
Date: Wed, 14 Jun 2023 16:07:05 +0530	[thread overview]
Message-ID: <20230614103707.2246296-1-venkataprasad.potturu@amd.com> (raw)

Add support for IPC tx_message with a reply_size set to zero,
return zero when message reply_size is zero at acp_dsp_ipc_get_reply().

Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
---
 sound/soc/sof/amd/acp-ipc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c
index 749e856dc601..8a0fc635a997 100644
--- a/sound/soc/sof/amd/acp-ipc.c
+++ b/sound/soc/sof/amd/acp-ipc.c
@@ -130,6 +130,13 @@ static void acp_dsp_ipc_get_reply(struct snd_sof_dev *sdev)
 		memcpy(msg->reply_data, &reply, sizeof(reply));
 		ret = reply.error;
 	} else {
+		/*
+		 * To support an IPC tx_message with a
+		 * reply_size set to zero.
+		 */
+		if (!msg->reply_size)
+			goto out;
+
 		/* reply correct size ? */
 		if (reply.hdr.size != msg->reply_size &&
 		    !(reply.hdr.cmd & SOF_IPC_GLB_PROBE)) {
-- 
2.25.1

