iommu/arm-smmu: handle pgtable_page_ctor() fail

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 181c9ba..2349d62 100644 (file)
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1212,7 +1212,10 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
 
                arm_smmu_flush_pgtable(smmu, page_address(table),
                                       ARM_SMMU_PTE_HWTABLE_SIZE);
-               pgtable_page_ctor(table);
+               if (!pgtable_page_ctor(table)) {
+                       __free_page(table);
+                       return -ENOMEM;
+               }
                pmd_populate(NULL, pmd, table);
                arm_smmu_flush_pgtable(smmu, pmd, sizeof(*pmd));
        }