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, 2 insertions, 3 deletions

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index b06cd4ca626f..3696e6e4143a 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -111,7 +111,6 @@ struct mxs_dma_chan {
         struct mxs_dma_ccw              *ccw;
         dma_addr_t                      ccw_phys;
         int                             desc_count;
-        dma_cookie_t                    last_completed;
         enum dma_status                 status;
         unsigned int                    flags;
 #define MXS_DMA_SG_LOOP                 (1 << 0)
@@ -274,7 +273,7 @@ static irqreturn_t mxs_dma_int_handler(int irq, void *dev_id)
                 stat1 &= ~(1 << channel);
 
                 if (mxs_chan->status == DMA_SUCCESS)
-                        mxs_chan->last_completed = mxs_chan->desc.cookie;
+                        mxs_chan->chan.completed_cookie = mxs_chan->desc.cookie;
 
                 /* schedule tasklet on this channel */
                 tasklet_schedule(&mxs_chan->tasklet);
@@ -538,7 +537,7 @@ static enum dma_status mxs_dma_tx_status(struct dma_chan *chan,
         dma_cookie_t last_used;
 
         last_used = chan->cookie;
-        dma_set_tx_state(txstate, mxs_chan->last_completed, last_used, 0);
+        dma_set_tx_state(txstate, chan->completed_cookie, last_used, 0);
 
         return mxs_chan->status;
 }