dmaengine: virt-dma: 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> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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@ -87,8 +87,7 @@ static void vchan_complete(unsigned long arg)
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{
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struct virt_dma_chan *vc = (struct virt_dma_chan *)arg;
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struct virt_dma_desc *vd;
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dma_async_tx_callback cb = NULL;
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void *cb_data = NULL;
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struct dmaengine_desc_callback cb;
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LIST_HEAD(head);
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spin_lock_irq(&vc->lock);
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@ -96,18 +95,17 @@ static void vchan_complete(unsigned long arg)
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vd = vc->cyclic;
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if (vd) {
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vc->cyclic = NULL;
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cb = vd->tx.callback;
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cb_data = vd->tx.callback_param;
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dmaengine_desc_get_callback(&vd->tx, &cb);
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} else {
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memset(&cb, 0, sizeof(cb));
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}
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spin_unlock_irq(&vc->lock);
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if (cb)
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cb(cb_data);
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dmaengine_desc_callback_invoke(&cb, NULL);
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while (!list_empty(&head)) {
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vd = list_first_entry(&head, struct virt_dma_desc, node);
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cb = vd->tx.callback;
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cb_data = vd->tx.callback_param;
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dmaengine_desc_get_callback(&vd->tx, &cb);
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list_del(&vd->node);
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if (dmaengine_desc_test_reuse(&vd->tx))
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@ -115,8 +113,7 @@ static void vchan_complete(unsigned long arg)
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else
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vc->desc_free(vd);
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if (cb)
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cb(cb_data);
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dmaengine_desc_callback_invoke(&cb, NULL);
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}
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}
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