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Date: Sun, 19 Apr 2020 18:49:10 +0200 From: Lubomir Rintel <lkundrak@...sk> To: Vinod Koul <vkoul@...nel.org> Cc: Dan Williams <dan.j.williams@...el.com>, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, Lubomir Rintel <lkundrak@...sk> Subject: [PATCH 5/7] dmaengine: mmp_tdma: Log an error if channel is in wrong state Let's log an error if the channel can't be prepared because it is in an unexpected state. Signed-off-by: Lubomir Rintel <lkundrak@...sk> --- drivers/dma/mmp_tdma.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c index 0b1aa6eab1801..191640f26246d 100644 --- a/drivers/dma/mmp_tdma.c +++ b/drivers/dma/mmp_tdma.c @@ -436,8 +436,10 @@ static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic( int num_periods = buf_len / period_len; int i = 0, buf = 0; - if (tdmac->status != DMA_COMPLETE) + if (tdmac->status != DMA_COMPLETE) { + dev_err(tdmac->dev, "controller busy"); return NULL; + } if (period_len > TDMA_MAX_XFER_BYTES) { dev_err(tdmac->dev, -- 2.26.0
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