Commit 09d5b702 authored by Alexandru Ardelean's avatar Alexandru Ardelean Committed by Vinod Koul
Browse files

dmaengine: virt-dma: store result on dma descriptor 



This allows each virtual channel to store information about each transfer
that completed, i.e. which transfer succeeded (or which failed) and if
there was any residue data on each (completed) transfer.

Signed-off-by: default avatarAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a08a9645

drivers/dma/virt-dma.c

+2 −2
Original line number Diff line number Diff line
@@ -101,7 +101,7 @@ static void vchan_complete(unsigned long arg) 
	}

	spin_unlock_irq(&vc->lock);



	dmaengine_desc_callback_invoke(&cb, NULL);

	dmaengine_desc_callback_invoke(&cb, &vd->tx_result);



	list_for_each_entry_safe(vd, _vd, &head, node) {

		dmaengine_desc_get_callback(&vd->tx, &cb);
@@ -109,7 +109,7 @@ static void vchan_complete(unsigned long arg) 
		list_del(&vd->node);

		vchan_vdesc_fini(vd);



		dmaengine_desc_callback_invoke(&cb, NULL);

		dmaengine_desc_callback_invoke(&cb, &vd->tx_result);

	}

}

drivers/dma/virt-dma.h

+4 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 


struct virt_dma_desc {

	struct dma_async_tx_descriptor tx;

	struct dmaengine_result tx_result;

	/* protected by vc.lock */

	struct list_head node;

};
@@ -65,6 +66,9 @@ static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan 
	vd->tx.tx_submit = vchan_tx_submit;

	vd->tx.desc_free = vchan_tx_desc_free;



	vd->tx_result.result = DMA_TRANS_NOERROR;

	vd->tx_result.residue = 0;



	spin_lock_irqsave(&vc->lock, flags);

	list_add_tail(&vd->node, &vc->desc_allocated);

	spin_unlock_irqrestore(&vc->lock, flags);

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