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Commit e63a47a3 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul
Browse files

dw_dmac: introduce to_dw_desc() macro 



The to_dw_desc() macro helps to retrieve the dw_desc node from the
corresponding list_head structure.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@linux.intel.com>
parent ba84bd71

drivers/dma/dw_dmac.c

+2 −4
Original line number Diff line number Diff line
@@ -93,7 +93,7 @@ static struct device *chan2parent(struct dma_chan *chan) 


static struct dw_desc *dwc_first_active(struct dw_dma_chan *dwc)

{

	return list_entry(dwc->active_list.next, struct dw_desc, desc_node);

	return to_dw_desc(dwc->active_list.next);

}



static struct dw_desc *dwc_desc_get(struct dw_dma_chan *dwc)
@@ -600,9 +600,7 @@ static void dw_dma_tasklet(unsigned long data) 
			if (test_bit(DW_DMA_IS_SOFT_LLP, &dwc->flags)) {

				if (dwc->tx_node_active != dwc->tx_list) {

					struct dw_desc *desc =

						list_entry(dwc->tx_node_active,

							   struct dw_desc,

							   desc_node);

						to_dw_desc(dwc->tx_node_active);



					dma_writel(dw, CLEAR.XFER, dwc->mask);

drivers/dma/dw_dmac_regs.h

+2 −0
Original line number Diff line number Diff line
@@ -299,6 +299,8 @@ struct dw_desc { 
	size_t				len;

};



#define to_dw_desc(h)	list_entry(h, struct dw_desc, desc_node)



static inline struct dw_desc *

txd_to_dw_desc(struct dma_async_tx_descriptor *txd)

{