diff options
Diffstat (limited to 'drivers/dma/ptdma')
| -rw-r--r-- | drivers/dma/ptdma/ptdma-dmaengine.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/dma/ptdma/ptdma-dmaengine.c b/drivers/dma/ptdma/ptdma-dmaengine.c index c9e52f6f2f50..91b93e8d9779 100644 --- a/drivers/dma/ptdma/ptdma-dmaengine.c +++ b/drivers/dma/ptdma/ptdma-dmaengine.c @@ -100,12 +100,17 @@ static struct pt_dma_desc *pt_handle_active_desc(struct pt_dma_chan *chan, spin_lock_irqsave(&chan->vc.lock, flags); if (desc) { - if (desc->status != DMA_ERROR) - desc->status = DMA_COMPLETE; - - dma_cookie_complete(tx_desc); - dma_descriptor_unmap(tx_desc); - list_del(&desc->vd.node); + if (desc->status != DMA_COMPLETE) { + if (desc->status != DMA_ERROR) + desc->status = DMA_COMPLETE; + + dma_cookie_complete(tx_desc); + dma_descriptor_unmap(tx_desc); + list_del(&desc->vd.node); + } else { + /* Don't handle it twice */ + tx_desc = NULL; + } } desc = pt_next_dma_desc(chan); @@ -233,9 +238,14 @@ static void pt_issue_pending(struct dma_chan *dma_chan) struct pt_dma_chan *chan = to_pt_chan(dma_chan); struct pt_dma_desc *desc; unsigned long flags; + bool engine_is_idle = true; spin_lock_irqsave(&chan->vc.lock, flags); + desc = pt_next_dma_desc(chan); + if (desc) + engine_is_idle = false; + vchan_issue_pending(&chan->vc); desc = pt_next_dma_desc(chan); @@ -243,7 +253,7 @@ static void pt_issue_pending(struct dma_chan *dma_chan) spin_unlock_irqrestore(&chan->vc.lock, flags); /* If there was nothing active, start processing */ - if (desc) + if (engine_is_idle) pt_cmd_callback(desc, 0); } |