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 benjamin.gaignard@linaro.org Cc: Catalin Marinas catalin.marinas@arm.com Cc: arnd@arndb.de --- 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;