diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dma-coherent.c | 5 | ||||
| -rw-r--r-- | drivers/base/dma-mapping.c | 6 |
2 files changed, 5 insertions, 6 deletions
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index 1e6396bb807b..597d40893862 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -312,8 +312,9 @@ static int __dma_mmap_from_coherent(struct dma_coherent_mem *mem, * This checks whether the memory was allocated from the per-device * coherent memory pool and if so, maps that memory to the provided vma. * - * Returns 1 if we correctly mapped the memory, or 0 if the caller should - * proceed with mapping memory from generic pools. + * Returns 1 if @vaddr belongs to the device coherent pool and the caller + * should return @ret, or 0 if they should proceed with mapping memory from + * generic areas. */ int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma, void *vaddr, size_t size, int *ret) diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index 3b118353ea17..d82566d6e237 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -226,7 +226,6 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, #ifndef CONFIG_ARCH_NO_COHERENT_DMA_MMAP unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; - unsigned long pfn = page_to_pfn(virt_to_page(cpu_addr)); unsigned long off = vma->vm_pgoff; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); @@ -234,12 +233,11 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret)) return ret; - if (off < count && user_count <= (count - off)) { + if (off < count && user_count <= (count - off)) ret = remap_pfn_range(vma, vma->vm_start, - pfn + off, + page_to_pfn(virt_to_page(cpu_addr)) + off, user_count << PAGE_SHIFT, vma->vm_page_prot); - } #endif /* !CONFIG_ARCH_NO_COHERENT_DMA_MMAP */ return ret; |
