staging: tidspbridge: add pud code

And fix the following warning for passing an incorrect
variable type.

../tiomap3430.c: In function 'user_va2_pa':
../tiomap3430.c:1555:
    warning: passing argument 1 of 'pmd_offset' from
    incompatible pointer type
arch/arm/include/asm/pgtable-2level.h:156:
    note: expected 'struct pud_t *' but argument is of
    type 'pmdval_t (*)[2]'

While at it, eliminate 'if' nesting to increase readability.

Signed-off-by: Omar Ramirez Luna <omar.ramirez@copitl.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 17 insertions, 10 deletions

diff --git a/drivers/staging/tidspbridge/core/tiomap3430.c b/drivers/staging/tidspbridge/core/tiomap3430.c
index 9cf29fcea11..f9609ce2c16 100644
--- a/drivers/staging/tidspbridge/core/tiomap3430.c
+++ b/drivers/staging/tidspbridge/core/tiomap3430.c
@@ -1547,20 +1547,27 @@ EXIT_LOOP:
 static u32 user_va2_pa(struct mm_struct *mm, u32 address)
 {
         pgd_t *pgd;
+        pud_t *pud;
         pmd_t *pmd;
         pte_t *ptep, pte;
 
         pgd = pgd_offset(mm, address);
-        if (!(pgd_none(*pgd) || pgd_bad(*pgd))) {
-                pmd = pmd_offset(pgd, address);
-                if (!(pmd_none(*pmd) || pmd_bad(*pmd))) {
-                        ptep = pte_offset_map(pmd, address);
-                        if (ptep) {
-                                pte = *ptep;
-                                if (pte_present(pte))
-                                        return pte & PAGE_MASK;
-                        }
-                }
+        if (pgd_none(*pgd) || pgd_bad(*pgd))
+                return 0;
+
+        pud = pud_offset(pgd, address);
+        if (pud_none(*pud) || pud_bad(*pud))
+                return 0;
+
+        pmd = pmd_offset(pud, address);
+        if (pmd_none(*pmd) || pmd_bad(*pmd))
+                return 0;
+
+        ptep = pte_offset_map(pmd, address);
+        if (ptep) {
+                pte = *ptep;
+                if (pte_present(pte))
+                        return pte & PAGE_MASK;
         }
 
         return 0;