From 2b4f130e05cb28a9794921aad5139615e94a7b02 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Mon, 9 Jan 2012 10:32:50 +0100 Subject: [PATCH] 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 [corrected change log to DMA engine API insteadof DMA API] Signed-off-by: Vinod Koul --- drivers/dma/imx-sdma.c | 11 +++++------ 1 file 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 -- 2.20.1