[PATCH] ASoC: SOF: imx8: check imx_sc_pm_cpu_start() return value

[Ștefan Ghețu]

imx8_run(), imx8x_run() and imx8_shutdown() check the return value of
every imx_sc_misc_set_control() call but ignore the one from
imx_sc_pm_cpu_start(), which propagates errors from imx_scu_call_rpc()
and can fail with -ETIMEDOUT, -EINVAL or -EPERM.

Reporting success after a failed start leaves the caller loading
firmware onto a core that is not running, and a failed shutdown is
similarly hidden from imx_chip_core_shutdown() callers, which do act on
the return value.

Propagate the error, matching imx95_core_shutdown() in imx9.c.

Signed-off-by: Ștefan Ghețu <stefanghetu9@xxxxxxxxx>
---
 sound/soc/sof/imx/imx8.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sof/imx/imx8.c b/sound/soc/sof/imx/imx8.c
index c2b4d379a3a3a..0820724dbb349 100644
--- a/sound/soc/sof/imx/imx8.c
+++ b/sound/soc/sof/imx/imx8.c
@@ -41,13 +41,18 @@ struct imx8m_chip_data {
 
 static int imx8_shutdown(struct snd_sof_dev *sdev)
 {
+	int ret;
 	/*
 	 * Force the DSP to stall. After the firmware image is loaded,
 	 * the stall will be removed during run() by a matching
 	 * imx_sc_pm_cpu_start() call.
 	 */
-	imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, false,
-			    RESET_VECTOR_VADDR);
+	ret = imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, false,
+				  RESET_VECTOR_VADDR);
+	if (ret < 0) {
+		dev_err(sdev->dev, "Error stalling DSP core %d\n", ret);
+		return ret;
+	}
 
 	return 0;
 }
@@ -88,8 +93,12 @@ static int imx8x_run(struct snd_sof_dev *sdev)
 		return ret;
 	}
 
-	imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, true,
-			    RESET_VECTOR_VADDR);
+	ret = imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, true,
+				  RESET_VECTOR_VADDR);
+	if (ret < 0) {
+		dev_err(sdev->dev, "Error starting DSP %d\n", ret);
+		return ret;
+	}
 
 	return 0;
 }
@@ -105,8 +114,12 @@ static int imx8_run(struct snd_sof_dev *sdev)
 		return ret;
 	}
 
-	imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, true,
-			    RESET_VECTOR_VADDR);
+	ret = imx_sc_pm_cpu_start(get_chip_pdata(sdev), IMX_SC_R_DSP, true,
+				  RESET_VECTOR_VADDR);
+	if (ret < 0) {
+		dev_err(sdev->dev, "Error starting DSP %d\n", ret);
+		return ret;
+	}
 
 	return 0;
 }
-- 
2.53.0