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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2017-11-14 15:32:11 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-12-04 18:03:51 +0100 |
| commit | 3ee7e42f3c9b62c0283a26ea13b97a8dd7dad44d (patch) | |
| tree | 54f99e9db38ddc1f17cf1ff59a1a6039cb6702cc /drivers/dma | |
| parent | dmaengine: img-mdc-dma: Use vchan_terminate_vdesc() instead of desc_free (diff) | |
| download | linux-3ee7e42f3c9b62c0283a26ea13b97a8dd7dad44d.tar.xz linux-3ee7e42f3c9b62c0283a26ea13b97a8dd7dad44d.zip | |
dmaengine: k3dma: Use vchan_terminate_vdesc() instead of desc_free
To avoid race with vchan_complete, use the race free way to terminate
running transfer.
Implement the device_synchronize callback to make sure that the terminated
descriptor is freed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/k3dma.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index 01d2a750a621..26b67455208f 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -719,7 +719,7 @@ static int k3_dma_terminate_all(struct dma_chan *chan) c->phy = NULL; p->vchan = NULL; if (p->ds_run) { - k3_dma_free_desc(&p->ds_run->vd); + vchan_terminate_vdesc(&p->ds_run->vd); p->ds_run = NULL; } p->ds_done = NULL; @@ -730,6 +730,13 @@ static int k3_dma_terminate_all(struct dma_chan *chan) return 0; } +static void k3_dma_synchronize(struct dma_chan *chan) +{ + struct k3_dma_chan *c = to_k3_chan(chan); + + vchan_synchronize(&c->vc); +} + static int k3_dma_transfer_pause(struct dma_chan *chan) { struct k3_dma_chan *c = to_k3_chan(chan); @@ -868,6 +875,7 @@ static int k3_dma_probe(struct platform_device *op) d->slave.device_pause = k3_dma_transfer_pause; d->slave.device_resume = k3_dma_transfer_resume; d->slave.device_terminate_all = k3_dma_terminate_all; + d->slave.device_synchronize = k3_dma_synchronize; d->slave.copy_align = DMAENGINE_ALIGN_8_BYTES; /* init virtual channel */ |