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Subject[PATCH] ASoC: amd: added error checks in dma driver
Date
added error checks in acp dma driver

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: Akshu Agrawal <Akshu.Agrawal@amd.com>
Signed-off-by: Guenter Roeck <groeck@chromium.org>
---
sound/soc/amd/acp-pcm-dma.c | 45 ++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 40 insertions(+), 5 deletions(-)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index 17d76fa..804e659 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,
@@ -1066,6 +1071,10 @@ static int acp_audio_probe(struct platform_device *pdev)
struct resource *res;
const u32 *pdata = pdev->dev.platform_data;

+ if (!pdata) {
+ dev_err(&pdev->dev, "Missing platform data\n");
+ return -ENODEV;
+ }
audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data),
GFP_KERNEL);
if (audio_drv_data == NULL)
@@ -1074,6 +1083,8 @@ static int acp_audio_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
audio_drv_data->acp_mmio = devm_ioremap_resource(&pdev->dev, res);

+ if (IS_ERR(audio_drv_data->acp_mmio))
+ return PTR_ERR(audio_drv_data->acp_mmio);
/* The following members gets populated in device 'open'
* function. Till then interrupts are disabled in 'acp_init'
* and device doesn't generate any interrupts.
@@ -1099,7 +1110,11 @@ 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\n");
+ return status;
+ }

status = snd_soc_register_platform(&pdev->dev, &acp_asoc_platform);
if (status != 0) {
@@ -1116,9 +1131,14 @@ 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\n");
+ return status;
+ }
snd_soc_unregister_platform(&pdev->dev);
pm_runtime_disable(&pdev->dev);

@@ -1128,9 +1148,14 @@ 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\n");
+ return status;
+ }

if (adata->play_stream && adata->play_stream->runtime) {
/* For Stoney, Memory gating is disabled,i.e SRAM Banks
@@ -1162,18 +1187,28 @@ 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\n");
+ return 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\n");
+ return status;
+ }
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}
--
2.7.4
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