| Message ID | 20200209163356.6439-20-digetx@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | NVIDIA Tegra APB DMA driver fixes and improvements | expand |
On 09/02/2020 16:33, Dmitry Osipenko wrote: > 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; > } > Acked-by: Jon Hunter <jonathanh@nvidia.com> Thanks! Jon
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; }
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(-)