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dmaengine: dw: introduce dwc_dostart_first_queued() helper

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We have a duplicate code which starts first descriptor in the queue. Let's make
this as a separate helper that can be used in future as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2014-06-18 12:15:36 +03:00 committed by Vinod Koul
parent f60f141ca5
commit e7637c6c03
1 changed files with 11 additions and 8 deletions
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19
drivers/dma/dw/core.c
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@ -279,6 +279,15 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first)
channel_set_bit(dw, CH_EN, dwc->mask);
}
static void dwc_dostart_first_queued(struct dw_dma_chan *dwc)
{
if (list_empty(&dwc->queue))
return;
list_move(dwc->queue.next, &dwc->active_list);
dwc_dostart(dwc, dwc_first_active(dwc));
}
/*----------------------------------------------------------------------*/
static void
@ -335,10 +344,7 @@ static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)
* the completed ones.
*/
list_splice_init(&dwc->active_list, &list);
if (!list_empty(&dwc->queue)) {
list_move(dwc->queue.next, &dwc->active_list);
dwc_dostart(dwc, dwc_first_active(dwc));
}
dwc_dostart_first_queued(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
@ -467,10 +473,7 @@ static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc)
/* Try to continue after resetting the channel... */
dwc_chan_disable(dw, dwc);
if (!list_empty(&dwc->queue)) {
list_move(dwc->queue.next, &dwc->active_list);
dwc_dostart(dwc, dwc_first_active(dwc));
}
dwc_dostart_first_queued(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
}