From: Johan Hovold <johan@kernel.org>
Date: Mon, 20 Oct 2025 04:53:17 +0000 (+0200)
Subject: iommu/sun50i: fix device leak on of_xlate()
X-Git-Tag: v5.15.198~172
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=157b01742a681791a59d7ee2f5fff200ef38ab52;p=thirdparty%2Fkernel%2Fstable.git

iommu/sun50i: fix device leak on of_xlate()

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>
---

diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
index 8593c79cfaeb1..07d1565bd22d5 100644
--- a/drivers/iommu/sun50i-iommu.c
+++ b/drivers/iommu/sun50i-iommu.c
@@ -756,6 +756,8 @@ static int sun50i_iommu_of_xlate(struct device *dev,
 
 	dev_iommu_priv_set(dev, platform_get_drvdata(iommu_pdev));
 
+	put_device(&iommu_pdev->dev);
+
 	return iommu_fwspec_add_ids(dev, &id, 1);
 }