diff options
| -rw-r--r-- | sound/soc/sof/trace.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c index 104388c551cb..ea8e4506d02e 100644 --- a/sound/soc/sof/trace.c +++ b/sound/soc/sof/trace.c @@ -320,6 +320,13 @@ static ssize_t sof_dfsentry_trace_read(struct file *file, char __user *buffer, if (count > avail) count = avail; + /* + * make sure that all trace data is available for the CPU as the trace + * data buffer might be allocated from non consistent memory. + * Note: snd_dma_buffer_sync() is called for normal audio playback and + * capture streams also. + */ + snd_dma_buffer_sync(&sdev->dmatb, SNDRV_DMA_SYNC_CPU); /* copy available trace data to debugfs */ rem = copy_to_user(buffer, ((u8 *)(dfse->buf) + lpos), count); if (rem) @@ -464,8 +471,9 @@ int snd_sof_init_trace(struct snd_sof_dev *sdev) } /* allocate trace data buffer */ - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev, - DMA_BUF_SIZE_FOR_TRACE, &sdev->dmatb); + ret = snd_dma_alloc_dir_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev, + DMA_FROM_DEVICE, DMA_BUF_SIZE_FOR_TRACE, + &sdev->dmatb); if (ret < 0) { dev_err(sdev->dev, "error: can't alloc buffer for trace %d\n", ret); |