Commit aca1bc45 authored Mar 21, 2014 by Bin Wang Committed by Will Deacon Apr 15, 2014

iommu/arm-smmu: fix panic in arm_smmu_alloc_init_pte



kernel panic happened when iommu_unmap a buffer larger than 2MB,
more than expected pmd entries got “invalidated”, due to a wrong range
passed to arm_smmu_alloc_init_pte. it was likely a typo, now we fix
it, passing the correct "end" address to arm_smmu_alloc_init_pte.

Signed-off-by: Bin Wang <binw@marvell.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 16c50dcf

drivers/iommu/arm-smmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1381,7 +1381,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device smmu, pud_t pud,

		do {
		next = pmd_addr_end(addr, end);
		ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, end, pfn,
		ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, next, pfn,
		prot, stage);
		phys += next - addr;
		} while (pmd++, addr = next, addr < end);