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authorRussell King - ARM Linux <linux@arm.linux.org.uk>2012-03-07 02:35:47 +0400
committerVinod Koul <vinod.koul@linux.intel.com>2012-03-13 10:07:22 +0400
commitd3ee98cdcd6198ea1cf75c603178acc8a805b69b (patch)
tree721f252d07d5e0596fa9b58a7c876dfd75823d0a /drivers/dma/dmaengine.h
parent96a2af41c78b1fbb1f567a3486bdc63f7b31c5fd (diff)
downloadlinux-d3ee98cdcd6198ea1cf75c603178acc8a805b69b.tar.xz
dmaengine: consolidate initialization of cookies
Provide a common function to initialize a channels cookie values. 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>
Diffstat (limited to 'drivers/dma/dmaengine.h')
-rw-r--r--drivers/dma/dmaengine.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dma/dmaengine.h b/drivers/dma/dmaengine.h
index 1ca5e0e633f4..17f983a4e9ba 100644
--- a/drivers/dma/dmaengine.h
+++ b/drivers/dma/dmaengine.h
@@ -9,6 +9,16 @@
#include <linux/dmaengine.h>
/**
+ * dma_cookie_init - initialize the cookies for a DMA channel
+ * @chan: dma channel to initialize
+ */
+static inline void dma_cookie_init(struct dma_chan *chan)
+{
+ chan->cookie = DMA_MIN_COOKIE;
+ chan->completed_cookie = DMA_MIN_COOKIE;
+}
+
+/**
* dma_cookie_assign - assign a DMA engine cookie to the descriptor
* @tx: descriptor needing cookie
*