dmaengine: consolidate assignment of DMA cookies

Everyone deals with assigning DMA cookies in the same way (it's part of
the API so they should be), so lets consolidate the common code into a
helper function to avoid this duplication.

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, 1 insertions, 7 deletions

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index c2914330b8fc..96d0a4fe8dd9 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -298,13 +298,7 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
         else
                 power_up = false;
 
-        cookie = sh_chan->common.cookie;
-        cookie++;
-        if (cookie < 0)
-                cookie = 1;
-
-        sh_chan->common.cookie = cookie;
-        tx->cookie = cookie;
+        cookie = dma_cookie_assign(tx);
 
         /* Mark all chunks of this descriptor as submitted, move to the queue */
         list_for_each_entry_safe(chunk, c, desc->node.prev, node) {