diff options
| author | Cezary Rojewski <cezary.rojewski@intel.com> | 2021-12-16 14:57:39 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-12-17 19:20:36 +0300 |
| commit | 2a9a72e290d4a4741e673f86b9fba9bfb319786d (patch) | |
| tree | a5a929ba4c35233abd291267b5d22ff21c185ad8 /sound/soc/intel/catpt | |
| parent | 0f2ee77d2655bd4bb205fff16822e551159f41c9 (diff) | |
| download | linux-2a9a72e290d4a4741e673f86b9fba9bfb319786d.tar.xz | |
ASoC: Intel: catpt: Test dmaengine_submit() result before moving on
After calling dmaengine_submit(), the submitted transfer descriptor
belongs to the DMA engine. Pointer to that descriptor may no longer be
valid after the call and should be tested before awaiting transfer
completion.
Reported-by: Kevin Tian <kevin.tian@intel.com>
Suggested-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 4fac9b31d0b9 ("ASoC: Intel: Add catpt base members")
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20211216115743.2130622-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/catpt')
| -rw-r--r-- | sound/soc/intel/catpt/dsp.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sound/soc/intel/catpt/dsp.c b/sound/soc/intel/catpt/dsp.c index 9c5fd18f2600..346bec000306 100644 --- a/sound/soc/intel/catpt/dsp.c +++ b/sound/soc/intel/catpt/dsp.c @@ -65,6 +65,7 @@ static int catpt_dma_memcpy(struct catpt_dev *cdev, struct dma_chan *chan, { struct dma_async_tx_descriptor *desc; enum dma_status status; + int ret; desc = dmaengine_prep_dma_memcpy(chan, dst_addr, src_addr, size, DMA_CTRL_ACK); @@ -77,13 +78,22 @@ static int catpt_dma_memcpy(struct catpt_dev *cdev, struct dma_chan *chan, catpt_updatel_shim(cdev, HMDC, CATPT_HMDC_HDDA(CATPT_DMA_DEVID, chan->chan_id), CATPT_HMDC_HDDA(CATPT_DMA_DEVID, chan->chan_id)); - dmaengine_submit(desc); + + ret = dma_submit_error(dmaengine_submit(desc)); + if (ret) { + dev_err(cdev->dev, "submit tx failed: %d\n", ret); + goto clear_hdda; + } + status = dma_wait_for_async_tx(desc); + ret = (status == DMA_COMPLETE) ? 0 : -EPROTO; + +clear_hdda: /* regardless of status, disable access to HOST memory in demand mode */ catpt_updatel_shim(cdev, HMDC, CATPT_HMDC_HDDA(CATPT_DMA_DEVID, chan->chan_id), 0); - return (status == DMA_COMPLETE) ? 0 : -EPROTO; + return ret; } int catpt_dma_memcpy_todsp(struct catpt_dev *cdev, struct dma_chan *chan, |