ion: check return value from remap_pfn_range
Check the return value of remap_pfn_range and return an error if it fails. Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -76,6 +76,7 @@ int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
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unsigned long offset = vma->vm_pgoff * PAGE_SIZE;
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unsigned long offset = vma->vm_pgoff * PAGE_SIZE;
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struct scatterlist *sg;
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struct scatterlist *sg;
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int i;
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int i;
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int ret;
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for_each_sg(table->sgl, sg, table->nents, i) {
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for_each_sg(table->sgl, sg, table->nents, i) {
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struct page *page = sg_page(sg);
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struct page *page = sg_page(sg);
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@ -91,8 +92,10 @@ int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
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offset = 0;
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offset = 0;
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}
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}
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len = min(len, remainder);
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len = min(len, remainder);
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remap_pfn_range(vma, addr, page_to_pfn(page), len,
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ret = remap_pfn_range(vma, addr, page_to_pfn(page), len,
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vma->vm_page_prot);
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vma->vm_page_prot);
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if (ret)
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return ret;
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addr += len;
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addr += len;
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if (addr >= vma->vm_end)
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if (addr >= vma->vm_end)
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return 0;
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return 0;
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