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Commit 860dd64c authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Vinod Koul
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dmaengine: axi_dmac: Add synchronization support 



Implement the new device_synchronize() callback to allow proper
synchronization when stopping a channel. Since the driver already makes
sure that no new complete callbacks are scheduled after the
device_terminate_all() callback has been called, all left to do in the
device_synchronize() callback is to wait for all currently running complete
callbacks to finish.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 2ed08629

drivers/dma/dma-axi-dmac.c

+8 −0
Original line number Diff line number Diff line
@@ -307,6 +307,13 @@ static int axi_dmac_terminate_all(struct dma_chan *c) 
	return 0;

}



static void axi_dmac_synchronize(struct dma_chan *c)

{

	struct axi_dmac_chan *chan = to_axi_dmac_chan(c);



	vchan_synchronize(&chan->vchan);

}



static void axi_dmac_issue_pending(struct dma_chan *c)

{

	struct axi_dmac_chan *chan = to_axi_dmac_chan(c);
@@ -613,6 +620,7 @@ static int axi_dmac_probe(struct platform_device *pdev) 
	dma_dev->device_prep_dma_cyclic = axi_dmac_prep_dma_cyclic;

	dma_dev->device_prep_interleaved_dma = axi_dmac_prep_interleaved;

	dma_dev->device_terminate_all = axi_dmac_terminate_all;

	dma_dev->device_synchronize = axi_dmac_synchronize;

	dma_dev->dev = &pdev->dev;

	dma_dev->chancnt = 1;

	dma_dev->src_addr_widths = BIT(dmac->chan.src_width);