+ Vladimir
2016-12-01 14:48 GMT+01:00 Benjamin Gaignard <[email protected]>: > commit ab6494f0c96f ("nommu: Add noMMU support to the DMA API") have > add CONFIG_MMU compilation flag but that prohibit to use dma_mmap_wc() > when the platform doesn't have MMU. > > This patch call vm_iomap_memory() in noMMU case to test if addresses > are correct and set wma->vm_flags rather than all return an error. > > Signed-off-by: Benjamin Gaignard <[email protected]> > Cc: Catalin Marinas <[email protected]> > Cc: [email protected] > --- > arch/arm/mm/dma-mapping.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c > index ab4f745..230875e 100644 > --- a/arch/arm/mm/dma-mapping.c > +++ b/arch/arm/mm/dma-mapping.c > @@ -868,6 +868,9 @@ static int __arm_dma_mmap(struct device *dev, struct > vm_area_struct *vma, > vma->vm_end - vma->vm_start, > vma->vm_page_prot); > } > +#else > + ret = vm_iomap_memory(vma, vma->vm_start, > + (vma->vm_end - vma->vm_start)); > #endif /* CONFIG_MMU */ > > return ret; > -- > 1.9.1 >
