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From:   Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
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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
Message-ID: <20230614103707.2246296-1-venkataprasad.potturu@amd.com>
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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