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, 8 deletions

diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index 326019832a13..e5aaae87ddfb 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -783,17 +783,10 @@ static dma_cookie_t ep93xx_dma_tx_submit(struct dma_async_tx_descriptor *tx)
         unsigned long flags;
 
         spin_lock_irqsave(&edmac->lock, flags);
-
-        cookie = edmac->chan.cookie;
-
-        if (++cookie < 0)
-                cookie = 1;
+        cookie = dma_cookie_assign(tx);
 
         desc = container_of(tx, struct ep93xx_dma_desc, txd);
 
-        edmac->chan.cookie = cookie;
-        desc->txd.cookie = cookie;
-
         /*
          * If nothing is currently prosessed, we push this descriptor
          * directly to the hardware. Otherwise we put the descriptor