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| author | Kevin Hilman <khilman@linaro.org> | 2015-12-17 08:48:38 -0800 |
|---|---|---|
| committer | Kevin Hilman <khilman@linaro.org> | 2015-12-17 08:48:38 -0800 |
| commit | 906d9eadd3b6698fa6ceb9bcdf41da6aa56d0a24 (patch) | |
| tree | b258d06410e154ce58d9b0d16ffba0834ff2a1ac /arch/arm/mm/dma-mapping.c | |
| parent | d3d3a134d75d28034b950bc0b6682ba0be976f37 (diff) | |
| parent | 9f41e6b222c4a04c7b46068df82842a6188b4a57 (diff) | |
Merge branch 'linux-linaro-lsk-v4.1' into linux-linaro-lsk-v4.1-rtlsk-v4.1-16.01-rtlsk-v4.1-15.12-rt
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 6e4b9ff22ef3..64d7486262e5 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1395,12 +1395,19 @@ static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma, unsigned long uaddr = vma->vm_start; unsigned long usize = vma->vm_end - vma->vm_start; struct page **pages = __iommu_get_pages(cpu_addr, attrs); + unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; + unsigned long off = vma->vm_pgoff; vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot); if (!pages) return -ENXIO; + if (off >= nr_pages || (usize >> PAGE_SHIFT) > nr_pages - off) + return -ENXIO; + + pages += off; + do { int ret = vm_insert_page(vma, uaddr, *pages++); if (ret) { |