From: Johan Hovold <johan@kernel.org>
Date: Mon, 20 Oct 2025 04:53:08 +0000 (+0200)
Subject: iommu/ipmmu-vmsa: fix device leak on of_xlate()
X-Git-Tag: v5.15.198~176
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cadf7c83302fb6912024793f2f07c3439f4dd307;p=thirdparty%2Fkernel%2Fstable.git

iommu/ipmmu-vmsa: fix device leak on of_xlate()

commit 80aa518452c4aceb9459f9a8e3184db657d1b441 upstream.

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

Fixes: 7b2d59611fef ("iommu/ipmmu-vmsa: Replace local utlb code with fwspec ids")
Cc: stable@vger.kernel.org	# 4.14
Cc: Magnus Damm <damm+renesas@opensource.se>
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/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 96708cd2757f7..f7e6e955b6bfd 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -710,6 +710,8 @@ static int ipmmu_init_platform_device(struct device *dev,
 
 	dev_iommu_priv_set(dev, platform_get_drvdata(ipmmu_pdev));
 
+	put_device(&ipmmu_pdev->dev);
+
 	return 0;
 }