6.6-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
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 --- drivers/iommu/apple-dart.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -758,6 +758,8 @@ static int apple_dart_of_xlate(struct de struct apple_dart *cfg_dart; int i, sid;
+ put_device(&iommu_pdev->dev); + if (args->args_count != 1) return -EINVAL; sid = args->args[0];