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, 9 deletions

diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index 1845ac9d6e88..6383abbecce6 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -513,18 +513,11 @@ static enum dma_status td_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 {
         struct timb_dma_chan *td_chan =
                 container_of(chan, struct timb_dma_chan, chan);
-        dma_cookie_t            last_used;
-        dma_cookie_t            last_complete;
-        int                     ret;
+        enum dma_status ret;
 
         dev_dbg(chan2dev(chan), "%s: Entry\n", __func__);
 
-        last_complete = chan->completed_cookie;
-        last_used = chan->cookie;
-
-        ret = dma_async_is_complete(cookie, last_complete, last_used);
-
-        dma_set_tx_state(txstate, last_complete, last_used, 0);
+        ret = dma_cookie_status(chan, cookie, txstate);
 
         dev_dbg(chan2dev(chan),
                 "%s: exit, ret: %d, last_complete: %d, last_used: %d\n",