diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-01-09 10:32:50 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-01-30 14:50:55 +0530 |
| commit | 2b4f130e05cb28a9794921aad5139615e94a7b02 (patch) | |
| tree | 0ebfcff3491cf5fc389692ef6179024a947c6657 /drivers/dma/imx-sdma.c | |
| parent | 5b3168763f507fd46285b7310fc2d18dafe7f1c7 (diff) | |
| download | linux-2b4f130e05cb28a9794921aad5139615e94a7b02.tar.gz | |
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.c | 11 |
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 |