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dmaengine: mmp_pdma: 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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2016-07-20 13:11:56 -07:00 committed by Vinod Koul
parent 7a883acd39
commit 9c1e511cc6
1 changed files with 5 additions and 9 deletions
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14
drivers/dma/mmp_pdma.c
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@ -864,19 +864,15 @@ static void dma_do_tasklet(unsigned long data)
struct mmp_pdma_desc_sw *desc, *_desc;
LIST_HEAD(chain_cleanup);
unsigned long flags;
struct dmaengine_desc_callback cb;
if (chan->cyclic_first) {
dma_async_tx_callback cb = NULL;
void *cb_data = NULL;
spin_lock_irqsave(&chan->desc_lock, flags);
desc = chan->cyclic_first;
cb = desc->async_tx.callback;
cb_data = desc->async_tx.callback_param;
dmaengine_desc_get_callback(&desc->async_tx, &cb);
spin_unlock_irqrestore(&chan->desc_lock, flags);
if (cb)
cb(cb_data);
dmaengine_desc_callback_invoke(&cb, NULL);
return;
}
@ -921,8 +917,8 @@ static void dma_do_tasklet(unsigned long data)
/* Remove from the list of transactions */
list_del(&desc->node);
/* Run the link descriptor callback function */
if (txd->callback)
txd->callback(txd->callback_param);
dmaengine_desc_get_callback(txd, &cb);
dmaengine_desc_callback_invoke(&cb, NULL);
dma_pool_free(chan->desc_pool, desc, txd->phys);
}