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authorDave Jiang <dave.jiang@intel.com>2016-07-20 13:11:00 -0700
committerVinod Koul <vinod.koul@intel.com>2016-08-08 08:11:38 +0530
commit577ef92512a5baf90233ab5d0dd6dd7dca33ee96 (patch)
treee10a8668265af3401d9206986354346f24d5e20a /drivers/dma/dw
parentb310a619ab3fc78350e1dab4af0312af99c60b39 (diff)
downloadlinux-577ef92512a5baf90233ab5d0dd6dd7dca33ee96.tar.bz2
dmaengine: dw: 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> Cc: Viresh Kumar <vireshk@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/dw')
-rw-r--r--drivers/dma/dw/core.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index edf053f73a49..12eedd457193 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -270,20 +270,19 @@ static void
dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
bool callback_required)
{
- dma_async_tx_callback callback = NULL;
- void *param = NULL;
struct dma_async_tx_descriptor *txd = &desc->txd;
struct dw_desc *child;
unsigned long flags;
+ struct dmaengine_desc_callback cb;
dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
spin_lock_irqsave(&dwc->lock, flags);
dma_cookie_complete(txd);
- if (callback_required) {
- callback = txd->callback;
- param = txd->callback_param;
- }
+ if (callback_required)
+ dmaengine_desc_get_callback(txd, &cb);
+ else
+ memset(&cb, 0, sizeof(cb));
/* async_tx_ack */
list_for_each_entry(child, &desc->tx_list, desc_node)
@@ -292,8 +291,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
dwc_desc_put(dwc, desc);
spin_unlock_irqrestore(&dwc->lock, flags);
- if (callback)
- callback(param);
+ dmaengine_desc_callback_invoke(&cb, NULL);
}
static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)