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| author | Dmitry Osipenko <digetx@gmail.com> | 2020-02-09 19:33:56 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-02-25 11:57:34 +0530 |
| commit | 01b66a7521274c1f208010db49af2a3d8e274400 (patch) | |
| tree | 21644af92c44930155ae2fb3641a1c45142e8b80 /drivers/dma | |
| parent | f261f1cd91efe36e932996efddaa7efffbb62831 (diff) | |
| download | lwn-01b66a7521274c1f208010db49af2a3d8e274400.tar.gz lwn-01b66a7521274c1f208010db49af2a3d8e274400.zip | |
dmaengine: tegra-apb: Improve error message about DMA underflow
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>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200209163356.6439-20-digetx@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/tegra20-apb-dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index 3265eb8e5d91..f1ff836abeaf 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; } |