From: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Date: Thu, 14 Nov 2013 22:31:49 +0000 (-0800)
Subject: iommu/arm-smmu: handle pgtable_page_ctor() fail
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=01058e70767de7b846588ef651c4d66e862f6823;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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 181c9ba929cd..2349d6272aef 100644
--- 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));
 	}