On Mon, 10 Dec 2012 13:37:44 +0200
Andy Shevchenko <[email protected]> wrote:
> We get a warning if CONFIG_DMA_API_DEBUG=y
>
> [ 28.150631] WARNING: at lib/dma-debug.c:933 check_unmap+0x5d6/0x6ac()
> [ 28.157058] dw_dmac dw_dmac.0: DMA-API: device driver failed to check map
> error[device address=0x0000000035698305] [size=14365 bytes] [mapped as single]
>
> ...
>
> --- a/drivers/dma/dmatest.c
> +++ b/drivers/dma/dmatest.c
> @@ -378,15 +378,35 @@ static int dmatest_func(void *data)
>
> dma_srcs[i] = dma_map_single(dev->dev, buf, len,
> DMA_TO_DEVICE);
> + ret = dma_mapping_error(dev->dev, dma_srcs[i]);
> + if (ret) {
> + unmap_src(dev->dev, dma_srcs, len, i);
> + pr_warn("%s: #%u: mapping error %d with "
> + "src_off=0x%x len=0x%x\n",
> + thread_name, total_tests - 1, ret,
> + src_off, len);
> + failed_tests++;
> + continue;
> + }
The changelog and the code don't match. Which one is out of date?
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