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Commit e518076e authored by Viresh Kumar's avatar Viresh Kumar Committed by Vinod Koul
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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: default avatarViresh Kumar <viresh.kumar@st.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 418e7407

drivers/dma/dw_dmac.c

+7 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc) 
	dma_async_tx_callback		callback;

	void				*param;

	struct dma_async_tx_descriptor	*txd = &desc->txd;

	struct dw_desc			*child;



	dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
@@ -206,6 +207,12 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc) 
	param = txd->callback_param;



	dwc_sync_desc_for_cpu(dwc, desc);



	/* async_tx_ack */

	list_for_each_entry(child, &desc->tx_list, desc_node)

		async_tx_ack(&child->txd);

	async_tx_ack(&desc->txd);



	list_splice_init(&desc->tx_list, &dwc->free_list);

	list_move(&desc->desc_node, &dwc->free_list);