[PATCH v2 2/9] iommu/amd: Remove redundant domain flush from attach_device()

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

Domain flush was introduced in attach_device() path to handle kdump
scenario. Later init code was enhanced to handle kdump scenario where
it also takes care of flushing everything including TLB
(see early_enable_iommus()).

Hence remove redundant flush from attach_device() function.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/amd/iommu.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 6a43ebddaf87..2d40bf5f406e 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1896,15 +1896,6 @@ static int attach_device(struct device *dev,
 
 	do_attach(dev_data, domain);
 
-	/*
-	 * We might boot into a crash-kernel here. The crashed kernel
-	 * left the caches in the IOMMU dirty. So we have to flush
-	 * here to evict all dirty stuff.
-	 */
-	amd_iommu_domain_flush_tlb_pde(domain);
-
-	amd_iommu_domain_flush_complete(domain);
-
 out:
 	spin_unlock(&dev_data->lock);
 
-- 
2.31.1