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, 2 insertions, 12 deletions

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index d9810ce3794c..486353e60a0a 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -810,26 +810,16 @@ static enum dma_status mv_xor_status(struct dma_chan *chan,
                                           struct dma_tx_state *txstate)
 {
         struct mv_xor_chan *mv_chan = to_mv_xor_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) {
                 mv_xor_clean_completed_slots(mv_chan);
                 return ret;
         }
         mv_xor_slot_cleanup(mv_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 void mv_dump_xor_regs(struct mv_xor_chan *chan)