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dw_dmac: Mark all tx_descriptors with DMA_CRTL_ACK after xfer finish
dwc_desc_get checks all descriptors for DMA_CTRL_ACK before allocating them for transfers. And descriptors are not marked with DMA_CRTL_ACK after transfer finishes. Thus descriptor once used is not usable again. This patch marks descriptors with DMA_CRTL_ACK after dma xfer finishes Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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1 changed files with 7 additions and 0 deletions
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@ -198,6 +198,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
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dma_async_tx_callback callback;
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void *param;
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struct dma_async_tx_descriptor *txd = &desc->txd;
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struct dw_desc *child;
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dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
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@ -206,6 +207,12 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
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param = txd->callback_param;
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dwc_sync_desc_for_cpu(dwc, desc);
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/* async_tx_ack */
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list_for_each_entry(child, &desc->tx_list, desc_node)
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async_tx_ack(&child->txd);
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async_tx_ack(&desc->txd);
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list_splice_init(&desc->tx_list, &dwc->free_list);
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list_move(&desc->desc_node, &dwc->free_list);
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