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Subject[PATCH v8 19/19] dmaengine: tegra-apb: Improve error message about DMA underflow
Date
Technically it is possible that DMA could be misconfigured in a way that
cyclic DMA transfer is processed slower than it takes to complete the
cycle and in this case the DMA is getting aborted with a not very
informative message about the problem, let's improve it.

Suggested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/dma/tegra20-apb-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 3e0373b89195..1a9b37c102ba 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -566,7 +566,7 @@ static bool handle_continuous_head_request(struct tegra_dma_channel *tdc,
if (!hsgreq->configured) {
tegra_dma_stop(tdc);
pm_runtime_put(tdc->tdma->dev);
- dev_err(tdc2dev(tdc), "Error in DMA transfer, aborting DMA\n");
+ dev_err(tdc2dev(tdc), "DMA transfer underflow, aborting DMA\n");
tegra_dma_abort_all(tdc);
return false;
}
--
2.24.0
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