linux-kernel - [PATCH] iommufd/device: Fix hwpt at err_unresv in iommufd_device_do

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Message-ID: <20240718050130.1956804-1-nicolinc@nvidia.com>
Date: Wed, 17 Jul 2024 22:01:30 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>, <kevin.tian@...el.com>
CC: <yi.l.liu@...el.com>, <iommu@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] iommufd/device: Fix hwpt at err_unresv in iommufd_device_do_replace()

The rewind routine should remove the reserved iovas added to the new hwpt.

Fixes: 89db31635c87 ("iommufd: Derive iommufd_hwpt_paging from iommufd_hw_pagetable")
Cc: stable@...r.kernel.org
Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/iommu/iommufd/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 9a7ec5997c61c..3214a4c17c6b3 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -526,7 +526,7 @@ iommufd_device_do_replace(struct iommufd_device *idev,
 err_unresv:
 	if (hwpt_is_paging(hwpt))
 		iommufd_group_remove_reserved_iova(igroup,
-						   to_hwpt_paging(old_hwpt));
+						   to_hwpt_paging(hwpt));
 err_unlock:
 	mutex_unlock(&idev->igroup->lock);
 	return ERR_PTR(rc);
-- 
2.43.0