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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
	Filippo Sironi <sironi@amazon.de>,
	iommu@lists.linux-foundation.org, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH AUTOSEL 4.4 139/174] iommu/amd: Wait for completion of IOTLB flush in attach_device
Date: Thu, 16 Jan 2020 12:42:16 -0500
Message-ID: <20200116174251.24326-139-sashal@kernel.org> (raw)
In-Reply-To: <20200116174251.24326-1-sashal@kernel.org>

From: Filippo Sironi <sironi@amazon.de>

[ Upstream commit 0b15e02f0cc4fb34a9160de7ba6db3a4013dc1b7 ]

To make sure the domain tlb flush completes before the
function returns, explicitly wait for its completion.

Signed-off-by: Filippo Sironi <sironi@amazon.de>
Fixes: 42a49f965a8d ("amd-iommu: flush domain tlb when attaching a new device")
[joro: Added commit message and fixes tag]
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iommu/amd_iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 0ad8b7c78a43..66a406e87e11 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2184,6 +2184,8 @@ static int attach_device(struct device *dev,
 	 */
 	domain_flush_tlb_pde(domain);
 
+	domain_flush_complete(domain);
+
 	return ret;
 }
 
-- 
2.20.1

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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116174251.24326-1-sashal@kernel.org>
2020-01-16 17:41 ` [PATCH AUTOSEL 4.4 085/174] iommu/vt-d: Make kernel parameter igfx_off work with vIOMMU Sasha Levin
2020-01-16 17:41 ` [PATCH AUTOSEL 4.4 096/174] iommu: Use right function to get group for device Sasha Levin
2020-01-16 17:41 ` [PATCH AUTOSEL 4.4 106/174] iommu/amd: Make iommu_disable safer Sasha Levin
2020-01-16 17:42 ` Sasha Levin [this message]

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