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dmaengine: mmp_tdma: Log an error if channel is in wrong state

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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@v3.sk>
Link: https://lore.kernel.org/r/20200419164912.670973-6-lkundrak@v3.sk
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Lubomir Rintel 2020-04-19 18:49:10 +02:00 committed by Vinod Koul
parent 0d8173f297
commit 4719d4b715
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/mmp_tdma.c
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@ -427,8 +427,10 @@ static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic(
int num_periods = buf_len / period_len; int num_periods = buf_len / period_len;
int i = 0, buf = 0; int i = 0, buf = 0;
if (tdmac->status != DMA_COMPLETE) if (tdmac->status != DMA_COMPLETE) {
dev_err(tdmac->dev, "controller busy");
return NULL; return NULL;
}
if (period_len > TDMA_MAX_XFER_BYTES) { if (period_len > TDMA_MAX_XFER_BYTES) {
dev_err(tdmac->dev, dev_err(tdmac->dev,