Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Dmitry Osipenko <> | Subject | [PATCH v8 19/19] dmaengine: tegra-apb: Improve error message about DMA underflow | Date | Sun, 9 Feb 2020 19:33:56 +0300 |
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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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