[PATCH] iommu/amd: Do not try copy old DTE resume path

[Vasant Hegde <vasant.hegde@amd.com>]

In suspend/resume path, no need to copy old DTE (early_enable_iommus()).
Just need to reload IOMMU hardware.

This is the side effect of commit 3ac3e5ee5ed5 ("iommu/amd: Copy old
trans table from old kernel") which changed early_enable_iommus() but
missed to fix enable_iommus().

Resume path continue to work as 'amd_iommu_pre_enabled' is set to false
and copy_device_table() will fail. It will just re-loaded IOMMU. Hence I
think we don't need to backport this to stable tree.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
---
 drivers/iommu/amd/init.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 43131c3a2172..3fa70169aace 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -2882,11 +2882,6 @@ static void enable_iommus_vapic(void)
 #endif
 }
 
-static void enable_iommus(void)
-{
-	early_enable_iommus();
-}
-
 static void disable_iommus(void)
 {
 	struct amd_iommu *iommu;
@@ -2913,7 +2908,8 @@ static void amd_iommu_resume(void)
 		iommu_apply_resume_quirks(iommu);
 
 	/* re-load the hardware */
-	enable_iommus();
+	for_each_iommu(iommu)
+		early_enable_iommu(iommu);
 
 	amd_iommu_enable_interrupts();
 }
-- 
2.31.1