linux-kernel - [PATCH 5.3 012/140] ASoC: SOF: loader: fix kernel oops on firmware boot failure

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Date:   Fri,  8 Nov 2019 19:49:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.3 012/140] ASoC: SOF: loader: fix kernel oops on firmware boot failure

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

[ Upstream commit 798614885a0e1b867ceb0197c30c2d82575c73b0 ]

When we fail to boot the firmware, we encounter a kernel oops in
hda_dsp_get_registers(), which is called conditionally in
hda_dsp_dump() when the sdev_>boot_complete flag is set.

Setting this flag _after_ dumping the data fixes the issue and does
not change the programming flow.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Link: https://lore.kernel.org/r/20190927200538.660-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/sof/loader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/loader.c b/sound/soc/sof/loader.c
index 952a19091c582..01775231f2b8d 100644
--- a/sound/soc/sof/loader.c
+++ b/sound/soc/sof/loader.c
@@ -370,10 +370,10 @@ int snd_sof_run_firmware(struct snd_sof_dev *sdev)
 				 msecs_to_jiffies(sdev->boot_timeout));
 	if (ret == 0) {
 		dev_err(sdev->dev, "error: firmware boot failure\n");
-		/* after this point FW_READY msg should be ignored */
-		sdev->boot_complete = true;
 		snd_sof_dsp_dbg_dump(sdev, SOF_DBG_REGS | SOF_DBG_MBOX |
 			SOF_DBG_TEXT | SOF_DBG_PCI);
+		/* after this point FW_READY msg should be ignored */
+		sdev->boot_complete = true;
 		return -EIO;
 	}
 
-- 
2.20.1