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dmaengine: move last completed cookie into generic dma_chan structure

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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>
This commit is contained in:
Russell King - ARM Linux
2012-03-06 22:34:06 +00:00
committed by Vinod Koul
parent 08714f60b0
commit 4d4e58de32
37 changed files with 83 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/dma/pch_dma.c
+2 -3
View File
@@ -105,7 +105,6 @@ struct pch_dma_chan {
spinlock_t lock;
dma_cookie_t completed_cookie;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;
@@ -544,7 +543,7 @@ static int pd_alloc_chan_resources(struct dma_chan *chan)
spin_lock_irq(&pd_chan->lock);
list_splice(&tmp_list, &pd_chan->free_list);
pd_chan->descs_allocated = i;
pd_chan->completed_cookie = chan->cookie = 1;
chan->completed_cookie = chan->cookie = 1;
spin_unlock_irq(&pd_chan->lock);
pdc_enable_irq(chan, 1);
@@ -583,7 +582,7 @@ static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
int ret;
spin_lock_irq(&pd_chan->lock);
last_completed = pd_chan->completed_cookie;
last_completed = chan->completed_cookie;
last_used = chan->cookie;
spin_unlock_irq(&pd_chan->lock);