From 463fbf6dc03aff41e973602bbad6cb135fa6d48a Mon Sep 17 00:00:00 2001
From: Keyon Jie <yang.jie@linux.intel.com>
Date: Fri, 25 Oct 2019 17:41:10 -0500
Subject: [PATCH] ASoC: SOF: Intel: hda-ipc: Don't read mailbox for PM_GATE reply
Git-commit: 463fbf6dc03aff41e973602bbad6cb135fa6d48a
Patch-mainline: v5.5-rc1
References: jsc#SLE-16518

Memory windows could be powered off before receiving PM_GATE IPC reply
from FW, we can't read the mailbox to get reply.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191025224122.7718-15-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/sof/intel/hda-ipc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/intel/hda-ipc.c b/sound/soc/sof/intel/hda-ipc.c
index 6aae6f18b3dc..0fd2153c1769 100644
--- a/sound/soc/sof/intel/hda-ipc.c
+++ b/sound/soc/sof/intel/hda-ipc.c
@@ -83,10 +83,12 @@ void hda_dsp_ipc_get_reply(struct snd_sof_dev *sdev)
 	}
 
 	hdr = msg->msg_data;
-	if (hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_CTX_SAVE)) {
+	if (hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_CTX_SAVE) ||
+	    hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_GATE)) {
 		/*
 		 * memory windows are powered off before sending IPC reply,
-		 * so we can't read the mailbox for CTX_SAVE reply.
+		 * so we can't read the mailbox for CTX_SAVE and PM_GATE
+		 * replies.
 		 */
 		reply.error = 0;
 		reply.hdr.cmd = SOF_IPC_GLB_REPLY;
-- 
2.16.4