From daa36bbcd78bca24db84e273bcafec9a8f81c767 Mon Sep 17 00:00:00 2001
From: Cezary Rojewski <cezary.rojewski@intel.com>
Date: Thu, 7 Jul 2022 14:41:47 +0200
Subject: [PATCH] ASoC: Intel: avs: Block IPC channel on suspend
Git-commit: daa36bbcd78bca24db84e273bcafec9a8f81c767
Patch-mainline: v6.0-rc1
References: jsc#PED-850

To allow for driver's filesystem interfaces e.g.: debugfs, to be touched
even when the device is asleep, mark IPC-channel as blocked when the
device is suspended. This causes any invocation of said interfaces that
do not toggle PM themselves to gracefully fail with "Operation not
permitted" message.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220707124153.1858249-7-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/intel/avs/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/intel/avs/core.c b/sound/soc/intel/avs/core.c
index 664f87c33e9d..4234adeb3d1c 100644
--- a/sound/soc/intel/avs/core.c
+++ b/sound/soc/intel/avs/core.c
@@ -556,6 +556,7 @@ static int __maybe_unused avs_suspend_common(struct avs_dev *adev)
 		return AVS_IPC_RET(ret);
 	}
 
+	avs_ipc_block(adev->ipc);
 	avs_dsp_op(adev, int_control, false);
 	snd_hdac_ext_bus_ppcap_int_enable(bus, false);
 
-- 
2.35.3