linux-kernel - [PATCH AUTOSEL 6.4 30/31] ASoC: SOF: amd: clear panic mask status when panic occurs

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Message-Id: <20230908193201.3462957-30-sashal@kernel.org>
Date:   Fri,  8 Sep 2023 15:31:59 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>,
        pierre-louis.bossart@...ux.intel.com, lgirdwood@...il.com,
        peter.ujfalusi@...ux.intel.com, yung-chuan.liao@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com, daniel.baluta@....com,
        perex@...ex.cz, tiwai@...e.com, Vsujithkumar.Reddy@....com,
        paul.olaru@....com, AjitKumar.Pandey@....com,
        venkataprasad.potturu@....com,
        sound-open-firmware@...a-project.org, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 6.4 30/31] ASoC: SOF: amd: clear panic mask status when panic occurs

From: Vijendar Mukunda <Vijendar.Mukunda@....com>

[ Upstream commit 3d02e1c439b4140215b624d423aa3c7554b17a5a ]

Due to scratch memory persistence, Once the DSP panic is reported, need to
clear the panic mask after handling DSP panic. Otherwise, It results in DSP
panic on next reboot.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
Link: https://lore.kernel.org/r/20230823073340.2829821-6-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/sof/amd/acp-ipc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c
index 749e856dc6011..6951c67bc599f 100644
--- a/sound/soc/sof/amd/acp-ipc.c
+++ b/sound/soc/sof/amd/acp-ipc.c
@@ -161,6 +161,8 @@ irqreturn_t acp_sof_ipc_irq_thread(int irq, void *context)
 		if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
 			snd_sof_dsp_panic(sdev, sdev->dsp_box.offset + sizeof(status),
 					  true);
+			status = 0;
+			acp_mailbox_write(sdev, sdev->dsp_box.offset, &status, sizeof(status));
 			return IRQ_HANDLED;
 		}
 		snd_sof_ipc_msgs_rx(sdev);
@@ -190,6 +192,8 @@ irqreturn_t acp_sof_ipc_irq_thread(int irq, void *context)
 	acp_mailbox_read(sdev, sdev->debug_box.offset, &status, sizeof(u32));
 	if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
 		snd_sof_dsp_panic(sdev, sdev->dsp_oops_offset, true);
+		status = 0;
+		acp_mailbox_write(sdev, sdev->debug_box.offset, &status, sizeof(status));
 		return IRQ_HANDLED;
 	}
 
-- 
2.40.1