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 749e856..8a0fc63 100644 (file)
--- 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)) {