From: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
Date: Wed, 14 Jun 2023 10:37:05 +0000 (+0530)
Subject: ASoC: SOF: amd: Add support for IPC with a reply_size set to zero
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fd01a15164a15328fd96f9ce820f0fc9f700f00b;p=linux.git

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

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>
Link: https://lore.kernel.org/r/20230614103707.2246296-1-venkataprasad.potturu@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c
index 749e856dc6011..8a0fc635a997c 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)) {