[PATCH 6.12 364/567] iommu/sun50i: fix device leak on of_xlate()

Greg Kroah-Hartman
2026-01-06T17:34:19Z

From: Johan Hovold <johan@kernel.org>

commit f916109bf53864605d10bf6f4215afa023a80406 upstream.

Make sure to drop the reference taken to the iommu platform device when
looking up its driver data during of_xlate().

Fixes: 4100b8c229b3 ("iommu: Add Allwinner H6 IOMMU driver")
Cc: stable@vger.kernel.org # 5.8
Cc: Maxime Ripard <mripard@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/iommu/sun50i-iommu.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/iommu/sun50i-iommu.c
+++ b/drivers/iommu/sun50i-iommu.c
@@ -837,6 +837,8 @@ static int sun50i_iommu_of_xlate(struct

dev_iommu_priv_set(dev, platform_get_drvdata(iommu_pdev));

+ put_device(&iommu_pdev->dev);
+
return iommu_fwspec_add_ids(dev, &id, 1);
}