diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2015-10-20 11:46:30 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-11-16 03:58:52 +0100 |
| commit | 860dd64c4382709a276eb4b7ef36596579dba04a (patch) | |
| tree | c9c38824245a6b5ff95c382050873fa3909b2865 /drivers | |
| parent | dmaengine: virt-dma: Add synchronization helper function (diff) | |
| download | linux-860dd64c4382709a276eb4b7ef36596579dba04a.tar.xz 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')
| -rw-r--r-- | drivers/dma/dma-axi-dmac.c | 8 |
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); |