On 04/12/15 03:24, Wang Hongcheng wrote:
Because amd iommu and software iommu need this mask.For example, if we use software iommu without this mask, we will get 'Out of SW-IOMMU space' error, when calling swiotlb_map_page function.
The commit title doesn't match the code, but either way this patch should now be unnecessary: 002edb6f6f2a ("dma-mapping: tidy up dma_parms default handling") resolves the problem at its source, and is already in 4.4-rc1.
(Incidentally, it was specifically the same PL330/SWIOTLB combination that led to that patch in the first place)
Robin.
Signed-off-by: Wan Zongshun <Vincent.Wan@xxxxxxx> Signed-off-by: Wang Hongcheng <annie.wang@xxxxxxx> --- drivers/dma/pl330.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 9d7af0d..fb46fdf 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2966,6 +2966,10 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) if (ret) dev_err(&adev->dev, "unable to set the seg size\n"); + dev_info(&adev->dev, "set the seg boundary\n"); + ret = dma_set_seg_boundary(&adev->dev, 0xffffffff); + if (ret) + dev_err(&adev->dev, "unable to set the seg boundary\n"); dev_info(&adev->dev, "Loaded driver for PL330 DMAC-%x\n", adev->periphid);
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