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/sirf-dma.c b/drivers/dma/sirf-dma.c
index 2333810d1688..60473f00cf1c 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -59,7 +59,6 @@ struct sirfsoc_dma_chan {
         struct list_head                queued;
         struct list_head                active;
         struct list_head                completed;
-        dma_cookie_t                    completed_cookie;
         unsigned long                   happened_cyclic;
         unsigned long                   completed_cyclic;
 
@@ -208,7 +207,7 @@ static void sirfsoc_dma_process_completed(struct sirfsoc_dma *sdma)
                         /* Free descriptors */
                         spin_lock_irqsave(&schan->lock, flags);
                         list_splice_tail_init(&list, &schan->free);
-                        schan->completed_cookie = last_cookie;
+                        schan->chan.completed_cookie = last_cookie;
                         spin_unlock_irqrestore(&schan->lock, flags);
                 } else {
                         /* for cyclic channel, desc is always in active list */
@@ -419,7 +418,7 @@ sirfsoc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 
         spin_lock_irqsave(&schan->lock, flags);
         last_used = schan->chan.cookie;
-        last_complete = schan->completed_cookie;
+        last_complete = schan->chan.completed_cookie;
         spin_unlock_irqrestore(&schan->lock, flags);
 
         dma_set_tx_state(txstate, last_complete, last_used, 0);
@@ -636,7 +635,7 @@ static int __devinit sirfsoc_dma_probe(struct platform_device *op)
 
                 schan->chan.device = dma;
                 schan->chan.cookie = 1;
-                schan->completed_cookie = schan->chan.cookie;
+                schan->chan.completed_cookie = schan->chan.cookie;
 
                 INIT_LIST_HEAD(&schan->free);
                 INIT_LIST_HEAD(&schan->prepared);