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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2014-06-18 12:15:36 +0300
committerVinod Koul <vinod.koul@intel.com>2014-07-15 22:14:28 +0530
commite7637c6c0382485f4d2e20715d058dae6f2b6a7c (patch)
tree613b0b426ca802c840a4f9d4bc395d2aad3c42b1 /drivers/dma/dw
parentf60f141ca5c106c8fa71abe324efb310b96621d1 (diff)
dmaengine: dw: introduce dwc_dostart_first_queued() helper
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>
Diffstat (limited to 'drivers/dma/dw')
-rw-r--r--drivers/dma/dw/core.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index a27ded53ab4f..5ddf5e4c1222 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -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);
}