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authorLars-Peter Clausen <lars@metafoo.de>2015-10-20 11:46:30 +0200
committerVinod Koul <vinod.koul@intel.com>2015-11-16 08:28:52 +0530
commit860dd64c4382709a276eb4b7ef36596579dba04a (patch)
treec9c38824245a6b5ff95c382050873fa3909b2865 /drivers/dma
parent2ed086296e60c3ca9a63a025701f4d104f4ced85 (diff)
downloadtalos-op-linux-860dd64c4382709a276eb4b7ef36596579dba04a.tar.gz
talos-op-linux-860dd64c4382709a276eb4b7ef36596579dba04a.zip
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: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dma-axi-dmac.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index 5b2395e7e04d..c3468094393e 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -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);
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