Commit 4c3cb6e9 authored Sep 03, 2016 by Dan Williams

dax: fix mapping size check

pgoff_to_phys() validates that both the starting address and the length
of the mapping against the resource list. We need to check for a
mapping size of PMD_SIZE not PAGE_SIZE in the pmd fault path.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

parent 3eab887a

drivers/dax/dax.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -459,7 +459,7 @@ static int __dax_dev_pmd_fault(struct dax_dev *dax_dev,
		}

		pgoff = linear_page_index(vma, pmd_addr);
		phys = pgoff_to_phys(dax_dev, pgoff, PAGE_SIZE);
		phys = pgoff_to_phys(dax_dev, pgoff, PMD_SIZE);
		if (phys == -1) {
		dev_dbg(dev, "%s: phys_to_pgoff(%#lx) failed\n", __func__,
		pgoff);