1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c
index 9ea6c440a00c..725881890c4a 100644
--- a/drivers/infiniband/hw/qib/qib_file_ops.c
+++ b/drivers/infiniband/hw/qib/qib_file_ops.c
@@ -835,7 +835,8 @@ static int mmap_piobufs(struct vm_area_struct *vma,
         vma->vm_flags &= ~VM_MAYREAD;
         vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
 
-        if (qib_wc_pat)
+        /* We used PAT if wc_cookie == 0 */
+        if (!dd->wc_cookie)
                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 
         ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,