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Subject[PATCH] ASoC: amd: added error checks in dma driver
Date
added additional error checks in acp dma driver
v2: printed error codes for acp init & acp deinit
failure cases.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
sound/soc/amd/acp-pcm-dma.c | 35 ++++++++++++++++++++++++++++++-----
1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index fb09578..29be517 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -848,6 +848,9 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct audio_substream_data *rtd = runtime->private_data;

+ if (!rtd)
+ return -EINVAL;
+
buffersize = frames_to_bytes(runtime, runtime->buffer_size);
bytescount = acp_get_byte_count(rtd->acp_mmio, substream->stream);

@@ -873,6 +876,8 @@ static int acp_dma_prepare(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct audio_substream_data *rtd = runtime->private_data;

+ if (!rtd)
+ return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
config_acp_dma_channel(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM,
PLAYBACK_START_DMA_DESCR_CH12,
@@ -1082,7 +1087,11 @@ static int acp_audio_probe(struct platform_device *pdev)
dev_set_drvdata(&pdev->dev, audio_drv_data);

/* Initialize the ACP */
- acp_init(audio_drv_data->acp_mmio, audio_drv_data->asic_type);
+ status = acp_init(audio_drv_data->acp_mmio, audio_drv_data->asic_type);
+ if (status) {
+ dev_err(&pdev->dev, "ACP Init failed status:%d\n", status);
+ return status;
+ }

status = snd_soc_register_platform(&pdev->dev, &acp_asoc_platform);
if (status != 0) {
@@ -1099,9 +1108,12 @@ static int acp_audio_probe(struct platform_device *pdev)

static int acp_audio_remove(struct platform_device *pdev)
{
+ int status;
struct audio_drv_data *adata = dev_get_drvdata(&pdev->dev);

- acp_deinit(adata->acp_mmio);
+ status = acp_deinit(adata->acp_mmio);
+ if (status)
+ dev_err(&pdev->dev, "ACP Deinit failed status:%d\n", status);
snd_soc_unregister_platform(&pdev->dev);
pm_runtime_disable(&pdev->dev);

@@ -1111,9 +1123,14 @@ static int acp_audio_remove(struct platform_device *pdev)
static int acp_pcm_resume(struct device *dev)
{
u16 bank;
+ int status;
struct audio_drv_data *adata = dev_get_drvdata(dev);

- acp_init(adata->acp_mmio, adata->asic_type);
+ status = acp_init(adata->acp_mmio, adata->asic_type);
+ if (status) {
+ dev_err(dev, "ACP Init failed status:%d\n", status);
+ return status;
+ }

if (adata->play_stream && adata->play_stream->runtime) {
/* For Stoney, Memory gating is disabled,i.e SRAM Banks
@@ -1145,18 +1162,26 @@ static int acp_pcm_resume(struct device *dev)

static int acp_pcm_runtime_suspend(struct device *dev)
{
+ int status;
struct audio_drv_data *adata = dev_get_drvdata(dev);

- acp_deinit(adata->acp_mmio);
+ status = acp_deinit(adata->acp_mmio);
+ if (status)
+ dev_err(dev, "ACP Deinit failed status:%d\n", status);
acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}

static int acp_pcm_runtime_resume(struct device *dev)
{
+ int status;
struct audio_drv_data *adata = dev_get_drvdata(dev);

- acp_init(adata->acp_mmio, adata->asic_type);
+ status = acp_init(adata->acp_mmio, adata->asic_type);
+ if (status) {
+ dev_err(dev, "ACP Init failed status:%d\n", status);
+ return status;
+ }
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}
--
2.7.4
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