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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index 803f3953b341..29f600f2c447 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -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);