From: Johan Hovold <johan@kernel.org>
Date: Mon, 20 Oct 2025 04:53:05 +0000 (+0200)
Subject: iommu/apple-dart: fix device leak on of_xlate()
X-Git-Tag: v6.12.64~212
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2e050e7872c8619399305ce0ec0c63d0dfc5c0f;p=thirdparty%2Fkernel%2Fstable.git

iommu/apple-dart: fix device leak on of_xlate()

commit a6eaa872c52a181ae9a290fd4e40c9df91166d7a upstream.

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

Fixes: 46d1fb072e76 ("iommu/dart: Add DART iommu driver")
Cc: stable@vger.kernel.org	# 5.15
Cc: Sven Peter <sven@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/apple-dart.c b/drivers/iommu/apple-dart.c
index e8d7bcbee1a22..05fad2c50c5a9 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -790,6 +790,8 @@ static int apple_dart_of_xlate(struct device *dev,
 	struct apple_dart *cfg_dart;
 	int i, sid;
 
+	put_device(&iommu_pdev->dev);
+
 	if (args->args_count != 1)
 		return -EINVAL;
 	sid = args->args[0];