From cba15617c37cc6082c286c2a272202565f62e7bc Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 18 Jun 2014 12:15:37 +0300 Subject: [PATCH] dmaengine: dw: add debug message to dwc_dostart_first_queued It would be useful to know when the first descriptor in the queue is started along with its cookie. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul --- drivers/dma/dw/core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 5ddf5e4c1222..52815b905b7c 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -281,11 +281,15 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first) static void dwc_dostart_first_queued(struct dw_dma_chan *dwc) { + struct dw_desc *desc; + if (list_empty(&dwc->queue)) return; list_move(dwc->queue.next, &dwc->active_list); - dwc_dostart(dwc, dwc_first_active(dwc)); + desc = dwc_first_active(dwc); + dev_vdbg(chan2dev(&dwc->chan), "%s: started %u\n", __func__, desc->txd.cookie); + dwc_dostart(dwc, desc); } /*----------------------------------------------------------------------*/ -- 2.20.1