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>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index 4d6d4cf6694..39a5cde9f42 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -188,7 +188,6 @@ struct mpc_dma_chan {
         struct list_head                completed;
         struct mpc_dma_tcd              *tcd;
         dma_addr_t                      tcd_paddr;
-        dma_cookie_t                    completed_cookie;
 
         /* Lock for this structure */
         spinlock_t                      lock;
@@ -365,7 +364,7 @@ static void mpc_dma_process_completed(struct mpc_dma *mdma)
                 /* Free descriptors */
                 spin_lock_irqsave(&mchan->lock, flags);
                 list_splice_tail_init(&list, &mchan->free);
-                mchan->completed_cookie = last_cookie;
+                mchan->chan.completed_cookie = last_cookie;
                 spin_unlock_irqrestore(&mchan->lock, flags);
         }
 }
@@ -568,7 +567,7 @@ mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 
         spin_lock_irqsave(&mchan->lock, flags);
         last_used = mchan->chan.cookie;
-        last_complete = mchan->completed_cookie;
+        last_complete = mchan->chan.completed_cookie;
         spin_unlock_irqrestore(&mchan->lock, flags);
 
         dma_set_tx_state(txstate, last_complete, last_used, 0);
@@ -742,7 +741,7 @@ static int __devinit mpc_dma_probe(struct platform_device *op)
 
                 mchan->chan.device = dma;
                 mchan->chan.cookie = 1;
-                mchan->completed_cookie = mchan->chan.cookie;
+                mchan->chan.completed_cookie = mchan->chan.cookie;
 
                 INIT_LIST_HEAD(&mchan->free);
                 INIT_LIST_HEAD(&mchan->prepared);