dmaengine: img-mdc-dma: 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> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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@ -694,7 +694,6 @@ static unsigned int mdc_get_new_events(struct mdc_chan *mchan)
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static int mdc_terminate_all(struct dma_chan *chan)
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{
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struct mdc_chan *mchan = to_mdc_chan(chan);
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struct mdc_tx_desc *mdesc;
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unsigned long flags;
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LIST_HEAD(head);
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@ -703,21 +702,28 @@ static int mdc_terminate_all(struct dma_chan *chan)
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mdc_chan_writel(mchan, MDC_CONTROL_AND_STATUS_CANCEL,
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MDC_CONTROL_AND_STATUS);
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mdesc = mchan->desc;
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mchan->desc = NULL;
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if (mchan->desc) {
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vchan_terminate_vdesc(&mchan->desc->vd);
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mchan->desc = NULL;
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}
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vchan_get_all_descriptors(&mchan->vc, &head);
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mdc_get_new_events(mchan);
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spin_unlock_irqrestore(&mchan->vc.lock, flags);
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if (mdesc)
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mdc_desc_free(&mdesc->vd);
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vchan_dma_desc_free_list(&mchan->vc, &head);
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return 0;
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}
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static void mdc_synchronize(struct dma_chan *chan)
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{
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struct mdc_chan *mchan = to_mdc_chan(chan);
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vchan_synchronize(&mchan->vc);
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}
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static int mdc_slave_config(struct dma_chan *chan,
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struct dma_slave_config *config)
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{
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@ -952,6 +958,7 @@ static int mdc_dma_probe(struct platform_device *pdev)
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mdma->dma_dev.device_tx_status = mdc_tx_status;
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mdma->dma_dev.device_issue_pending = mdc_issue_pending;
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mdma->dma_dev.device_terminate_all = mdc_terminate_all;
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mdma->dma_dev.device_synchronize = mdc_synchronize;
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mdma->dma_dev.device_config = mdc_slave_config;
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mdma->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
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