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ARM: 8633/1: nommu: allow mmap when !CONFIG_MMU

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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 vma->vm_flags rather than all return an error.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Benjamin Gaignard 2016-12-12 09:31:18 +01:00 committed by Russell King
parent 00a19f3e25
commit 79964a1c29
1 changed files with 3 additions and 0 deletions
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3
arch/arm/mm/dma-mapping.c
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@ -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;