mirror of https://gitee.com/openkylin/linux.git
dmaengine: dw: convert callback to helper function
This is in preperation of moving to a callback that provides results to the callback for the transaction. The conversion will maintain current behavior and the driver must convert to new callback mechanism at a later time in order to receive results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Viresh Kumar <vireshk@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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@ -270,20 +270,19 @@ static void
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dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
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bool callback_required)
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{
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dma_async_tx_callback callback = NULL;
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void *param = NULL;
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struct dma_async_tx_descriptor *txd = &desc->txd;
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struct dw_desc *child;
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unsigned long flags;
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struct dmaengine_desc_callback cb;
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dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
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spin_lock_irqsave(&dwc->lock, flags);
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dma_cookie_complete(txd);
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if (callback_required) {
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callback = txd->callback;
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param = txd->callback_param;
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}
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if (callback_required)
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dmaengine_desc_get_callback(txd, &cb);
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else
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memset(&cb, 0, sizeof(cb));
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/* async_tx_ack */
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list_for_each_entry(child, &desc->tx_list, desc_node)
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@ -292,8 +291,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
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dwc_desc_put(dwc, desc);
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spin_unlock_irqrestore(&dwc->lock, flags);
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if (callback)
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callback(param);
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dmaengine_desc_callback_invoke(&cb, NULL);
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}
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static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)
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