diff options
| -rw-r--r-- | drivers/dma/mmp_tdma.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c index 2e318558c644..42f8b2fb7684 100644 --- a/drivers/dma/mmp_tdma.c +++ b/drivers/dma/mmp_tdma.c @@ -427,6 +427,11 @@ static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic( int num_periods = buf_len / period_len; int i = 0, buf = 0; + if (!is_slave_direction(direction)) { + dev_err(tdmac->dev, "unsupported transfer direction\n"); + return NULL; + } + if (tdmac->status != DMA_COMPLETE) { dev_err(tdmac->dev, "controller busy"); return NULL; |