From 0ae3e11113b3132167308c26259f25b504da6ddc Mon Sep 17 00:00:00 2001 From: Robin Gong Date: Tue, 24 Jul 2018 22:12:24 +0800 Subject: [PATCH] MLK-19022-2: dmaengine: fsl-edma-v3: add device_synchronize Add device_synchronize for edma driver, since some driver such as Audio need it to make sure dma done callback never come out after resource related with dma channel free-ed by Audio driver. Android team report such issue on MA-12087. Signed-off-by: Robin Gong (cherry picked from commit 483519c063b08fc1ce0dd297b6c186799cf639d6) (cherry picked from commit 29ab274aca01ef8f5fc70e8c0a6d43a5bdb3c689) --- drivers/dma/fsl-edma-v3.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/dma/fsl-edma-v3.c +++ b/drivers/dma/fsl-edma-v3.c @@ -812,6 +812,13 @@ static void fsl_edma3_free_chan_resource fsl_chan->used = false; } +static void fsl_edma3_synchronize(struct dma_chan *chan) +{ + struct fsl_edma3_chan *fsl_chan = to_fsl_edma3_chan(chan); + + vchan_synchronize(&fsl_chan->vchan); +} + static int fsl_edma3_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -927,6 +934,7 @@ static int fsl_edma3_probe(struct platfo fsl_edma3->dma_dev.device_resume = fsl_edma3_resume; fsl_edma3->dma_dev.device_terminate_all = fsl_edma3_terminate_all; fsl_edma3->dma_dev.device_issue_pending = fsl_edma3_issue_pending; + fsl_edma3->dma_dev.device_synchronize = fsl_edma3_synchronize; fsl_edma3->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS; fsl_edma3->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS;