msm: iommu: Don't read from write-only registers

Don't read from V2Pxx command registers when doing
iova-to-phys operations. These registers are write-only and
reading the value before modifying the VA bits is
unnecessary.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm/mach-msm/iommu.c b/arch/arm/mach-msm/iommu.c
index 0146f519e85c..1a584e077c61 100644
--- a/arch/arm/mach-msm/iommu.c
+++ b/arch/arm/mach-msm/iommu.c
@@ -579,7 +579,7 @@ static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain,
 
         /* Invalidate context TLB */
         SET_CTX_TLBIALL(base, ctx, 0);
-        SET_V2PPR_VA(base, ctx, va >> V2Pxx_VA_SHIFT);
+        SET_V2PPR(base, ctx, va & V2Pxx_VA);
 
         par = GET_PAR(base, ctx);