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 --- drivers/iommu/apple-dart.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 95a4e62b8f63..9804022c7f59 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -802,6 +802,8 @@ 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];