diff mbox

[09/10] dmaengine: k3dma: Use vchan_terminate_vdesc() instead of desc_free

Message ID 20171114143212.8311-10-peter.ujfalusi@ti.com (mailing list archive)
State Accepted
Headers show

Commit Message

Peter Ujfalusi Nov. 14, 2017, 2:32 p.m. UTC 
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.

CC: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/dma/k3dma.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Comments

Zhangfei Gao Nov. 15, 2017, 4:06 a.m. UTC | #1 
On 2017年11月14日 22:32, Peter Ujfalusi wrote:
> 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.
>
> CC: Zhangfei Gao <zhangfei.gao@linaro.org>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

Thanks Peter.

Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
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diff mbox

Patch

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 */