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/coh901318.c b/drivers/dma/coh901318.c
index d65a718c0f9..521434bc313 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -59,7 +59,6 @@ struct coh901318_base {
 struct coh901318_chan {
         spinlock_t lock;
         int allocated;
-        int completed;
         int id;
         int stopped;
 
@@ -705,7 +704,7 @@ static void dma_tasklet(unsigned long data)
         callback_param = cohd_fin->desc.callback_param;
 
         /* sign this job as completed on the channel */
-        cohc->completed = cohd_fin->desc.cookie;
+        cohc->chan.completed_cookie = cohd_fin->desc.cookie;
 
         /* release the lli allocation and remove the descriptor */
         coh901318_lli_free(&cohc->base->pool, &cohd_fin->lli);
@@ -929,7 +928,7 @@ static int coh901318_alloc_chan_resources(struct dma_chan *chan)
         coh901318_config(cohc, NULL);
 
         cohc->allocated = 1;
-        cohc->completed = chan->cookie = 1;
+        chan->completed_cookie = chan->cookie = 1;
 
         spin_unlock_irqrestore(&cohc->lock, flags);
 
@@ -1169,7 +1168,7 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
         dma_cookie_t last_complete;
         int ret;
 
-        last_complete = cohc->completed;
+        last_complete = chan->completed_cookie;
         last_used = chan->cookie;
 
         ret = dma_async_is_complete(cookie, last_complete, last_used);