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dmaengine: consolidate tx_status functions

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Now that we have the completed cookie in the dma_chan structure, we
can consolidate the tx_status functions by providing a function to set
the txstate structure and returning the DMA status.  We also provide
a separate helper to set the residue for cookies which are still in
progress.

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 22:35:27 +00:00
committed by Vinod Koul
parent f7fbce07c6
commit 96a2af41c7
23 changed files with 92 additions and 234 deletions
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19
drivers/dma/intel_mid_dma.c
View File

@@ -477,30 +477,17 @@ static enum dma_status intel_mid_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&midc->lock);
midc_scan_descriptors(to_middma_device(chan->device), midc);
spin_unlock_bh(&midc->lock);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
}
if (txstate) {
txstate->last = last_complete;
txstate->used = last_used;
txstate->residue = 0;
}
return ret;
}