[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20220607164949.127136234@linuxfoundation.org>
Date: Tue, 7 Jun 2022 19:02:26 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Yong Wu <yong.wu@...iatek.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Joerg Roedel <jroedel@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 481/667] iommu/mediatek: Fix 2 HW sharing pgtable issue
From: Yong Wu <yong.wu@...iatek.com>
[ Upstream commit 645b87c190c959e9bb4f216b8c4add4ee880451a ]
In the commit 4f956c97d26b ("iommu/mediatek: Move domain_finalise into
attach_device"), I overlooked the sharing pgtable case.
After that commit, the "data" in the mtk_iommu_domain_finalise always is
the data of the current IOMMU HW. Fix this for the sharing pgtable case.
Only affect mt2712 which is the only SoC that share pgtable currently.
Fixes: 4f956c97d26b ("iommu/mediatek: Move domain_finalise into attach_device")
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
Link: https://lore.kernel.org/r/20220503071427.2285-5-yong.wu@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/iommu/mtk_iommu.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 5971a1168666..cf4e33db6a2d 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -451,7 +451,7 @@ static void mtk_iommu_domain_free(struct iommu_domain *domain)
static int mtk_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
- struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
+ struct mtk_iommu_data *data = dev_iommu_priv_get(dev), *frstdata;
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
struct device *m4udev = data->dev;
int ret, domid;
@@ -461,7 +461,10 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
return domid;
if (!dom->data) {
- if (mtk_iommu_domain_finalise(dom, data, domid))
+ /* Data is in the frstdata in sharing pgtable case. */
+ frstdata = mtk_iommu_get_m4u_data();
+
+ if (mtk_iommu_domain_finalise(dom, frstdata, domid))
return -ENODEV;
dom->data = data;
}
--
2.35.1
Powered by blists - more mailing lists