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dmaengine: tegra20-apb-dma: 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: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2016-07-20 13:13:16 -07:00 committed by Vinod Koul
parent 3a315d5d4b
commit 370c0446af
1 changed files with 4 additions and 6 deletions
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10
drivers/dma/tegra20-apb-dma.c
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@ -655,8 +655,7 @@ static void handle_cont_sngl_cycle_dma_done(struct tegra_dma_channel *tdc,
static void tegra_dma_tasklet(unsigned long data)
{
struct tegra_dma_channel *tdc = (struct tegra_dma_channel *)data;
dma_async_tx_callback callback = NULL;
void *callback_param = NULL;
struct dmaengine_desc_callback cb;
struct tegra_dma_desc *dma_desc;
unsigned long flags;
int cb_count;
@ -666,13 +665,12 @@ static void tegra_dma_tasklet(unsigned long data)
dma_desc = list_first_entry(&tdc->cb_desc,
typeof(*dma_desc), cb_node);
list_del(&dma_desc->cb_node);
callback = dma_desc->txd.callback;
callback_param = dma_desc->txd.callback_param;
dmaengine_desc_get_callback(&dma_desc->txd, &cb);
cb_count = dma_desc->cb_count;
dma_desc->cb_count = 0;
spin_unlock_irqrestore(&tdc->lock, flags);
while (cb_count-- && callback)
callback(callback_param);
while (cb_count--)
dmaengine_desc_callback_invoke(&cb, NULL);
spin_lock_irqsave(&tdc->lock, flags);
}
spin_unlock_irqrestore(&tdc->lock, flags);