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dmaengine: at_hdmac: convert callback to helper function

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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: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2016-07-20 13:10:37 -07:00 committed by Vinod Koul
parent f083f55718
commit dff232dab9
1 changed files with 2 additions and 9 deletions
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11
drivers/dma/at_hdmac.c
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@ -473,15 +473,11 @@ atc_chain_complete(struct at_dma_chan *atchan, struct at_desc *desc)
/* for cyclic transfers,
* no need to replay callback function while stopping */
if (!atc_chan_is_cyclic(atchan)) {
dma_async_tx_callback callback = txd->callback;
void *param = txd->callback_param;
/*
* The API requires that no submissions are done from a
* callback, so we don't need to drop the lock here
*/
if (callback)
callback(param);
dmaengine_desc_get_callback_invoke(txd, NULL);
}
dma_run_dependencies(txd);
@ -598,15 +594,12 @@ static void atc_handle_cyclic(struct at_dma_chan *atchan)
{
struct at_desc *first = atc_first_active(atchan);
struct dma_async_tx_descriptor *txd = &first->txd;
dma_async_tx_callback callback = txd->callback;
void *param = txd->callback_param;
dev_vdbg(chan2dev(&atchan->chan_common),
"new cyclic period llp 0x%08x\n",
channel_readl(atchan, DSCR));
if (callback)
callback(param);
dmaengine_desc_get_callback_invoke(txd, NULL);
}
/*-- IRQ & Tasklet ---------------------------------------------------*/