From 4ca0be7a2c9265b00ecc205cec786a0f507d1ff5 Mon Sep 17 00:00:00 2001
From: Prakash Gupta <guptap@codeaurora.org>
Date: Tue, 18 Aug 2020 15:56:24 +0530
Subject: [PATCH] iommu: skip iommu_tlb_sync in iommu_unmap()

Downstream arm-smmu impl, perform SYNC as part of unmap().
This is done under arm_smmu_tlb_inv_context_s1. This double the sync
operation. This impacts the unmap time, remove this duplicate sync
operation.

Change-Id: Ic98fc04a8102fe3a0b79e52b33daabf94732fcbf
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
---
 drivers/iommu/iommu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 2193417f39d9..470a364cd452 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2030,7 +2030,6 @@ size_t iommu_unmap(struct iommu_domain *domain,
 
 	iommu_iotlb_gather_init(&iotlb_gather);
 	ret = __iommu_unmap(domain, iova, size, &iotlb_gather);
-	iommu_tlb_sync(domain, &iotlb_gather);
 
 	return ret;
 }