dmaengine: move last completed cookie into generic dma_chan structure

Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures.  This is pointless, and
forces driver specific code.  Move this out into the common dma_chan
structure.

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>

2 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/amba/pl08x.h b/include/linux/amba/pl08x.h
index 2c58853ca423..e64ce2cfee99 100644
--- a/include/linux/amba/pl08x.h
+++ b/include/linux/amba/pl08x.h
@@ -172,7 +172,6 @@ enum pl08x_dma_chan_state {
  * @runtime_addr: address for RX/TX according to the runtime config
  * @runtime_direction: current direction of this channel according to
  * runtime config
- * @lc: last completed transaction on this channel
  * @pend_list: queued transactions pending on this channel
  * @at: active transaction on this channel
  * @lock: a lock for this channel data
@@ -197,7 +196,6 @@ struct pl08x_dma_chan {
         u32 src_cctl;
         u32 dst_cctl;
         enum dma_transfer_direction runtime_direction;
-        dma_cookie_t lc;
         struct list_head pend_list;
         struct pl08x_txd *at;
         spinlock_t lock;
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 7e640bf27d2d..c59c4f0c2cc9 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -258,6 +258,7 @@ struct dma_chan_percpu {
  * struct dma_chan - devices supply DMA channels, clients use them
  * @device: ptr to the dma device who supplies this channel, always !%NULL
  * @cookie: last cookie value returned to client
+ * @completed_cookie: last completed cookie for this channel
  * @chan_id: channel ID for sysfs
  * @dev: class device for sysfs
  * @device_node: used to add this to the device chan list
@@ -269,6 +270,7 @@ struct dma_chan_percpu {
 struct dma_chan {
         struct dma_device *device;
         dma_cookie_t cookie;
+        dma_cookie_t completed_cookie;
 
         /* sysfs */
         int chan_id;