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authorSascha Hauer <s.hauer@pengutronix.de>2012-01-09 10:32:50 +0100
committerVinod Koul <vinod.koul@linux.intel.com>2012-01-30 14:50:55 +0530
commit2b4f130e05cb28a9794921aad5139615e94a7b02 (patch)
tree0ebfcff3491cf5fc389692ef6179024a947c6657 /drivers/dma/imx-sdma.c
parent5b3168763f507fd46285b7310fc2d18dafe7f1c7 (diff)
downloadlwn-2b4f130e05cb28a9794921aad5139615e94a7b02.tar.gz
lwn-2b4f130e05cb28a9794921aad5139615e94a7b02.zip
dma: imx-sdma: start transfer in issue_pending
The DMA engine API requires that transfers are started in issue_pending instead of tx_submit. Fix this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> [corrected change log to DMA engine API insteadof DMA API] Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/imx-sdma.c')
-rw-r--r--drivers/dma/imx-sdma.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index a8af379680c1..e58dbf638cc9 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -838,15 +838,12 @@ static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
{
unsigned long flags;
struct sdma_channel *sdmac = to_sdma_chan(tx->chan);
- struct sdma_engine *sdma = sdmac->sdma;
dma_cookie_t cookie;
spin_lock_irqsave(&sdmac->lock, flags);
cookie = sdma_assign_cookie(sdmac);
- sdma_enable_channel(sdma, sdmac->channel);
-
spin_unlock_irqrestore(&sdmac->lock, flags);
return cookie;
@@ -1135,9 +1132,11 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
static void sdma_issue_pending(struct dma_chan *chan)
{
- /*
- * Nothing to do. We only have a single descriptor
- */
+ struct sdma_channel *sdmac = to_sdma_chan(chan);
+ struct sdma_engine *sdma = sdmac->sdma;
+
+ if (sdmac->status == DMA_IN_PROGRESS)
+ sdma_enable_channel(sdma, sdmac->channel);
}
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34