dmaengine: consolidate tx_status functions

Now that we have the completed cookie in the dma_chan structure, we
can consolidate the tx_status functions by providing a function to set
the txstate structure and returning the DMA status.  We also provide
a separate helper to set the residue for cookies which are still in
progress.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 3 insertions, 13 deletions

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index f2392d59568d..b1e3be089c52 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -894,24 +894,14 @@ static enum dma_status iop_adma_status(struct dma_chan *chan,
                                         struct dma_tx_state *txstate)
 {
         struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-        dma_cookie_t last_used;
-        dma_cookie_t last_complete;
-        enum dma_status ret;
-
-        last_used = chan->cookie;
-        last_complete = chan->completed_cookie;
-        dma_set_tx_state(txstate, last_complete, last_used, 0);
-        ret = dma_async_is_complete(cookie, last_complete, last_used);
+
+        ret = dma_cookie_status(chan, cookie, txstate);
         if (ret == DMA_SUCCESS)
                 return ret;
 
         iop_adma_slot_cleanup(iop_chan);
 
-        last_used = chan->cookie;
-        last_complete = chan->completed_cookie;
-        dma_set_tx_state(txstate, last_complete, last_used, 0);
-
-        return dma_async_is_complete(cookie, last_complete, last_used);
+        return dma_cookie_status(chan, cookie, txstate);
 }
 
 static irqreturn_t iop_adma_eot_handler(int irq, void *data)