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/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 0fcff6508fb1..d4620c53fd2d 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -867,14 +867,7 @@ static dma_cookie_t idmac_tx_submit(struct dma_async_tx_descriptor *tx)
 
         dev_dbg(dev, "Submitting sg %p\n", &desc->sg[0]);
 
-        cookie = ichan->dma_chan.cookie;
-
-        if (++cookie < 0)
-                cookie = 1;
-
-        /* from dmaengine.h: "last cookie value returned to client" */
-        ichan->dma_chan.cookie = cookie;
-        tx->cookie = cookie;
+        cookie = dma_cookie_assign(tx);
 
         /* ipu->lock can be taken under ichan->lock, but not v.v. */
         spin_lock_irqsave(&ichan->lock, flags);