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 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 --- drivers/iommu/sun50i-iommu.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -824,6 +824,8 @@ static int sun50i_iommu_of_xlate(struct
dev_iommu_priv_set(dev, platform_get_drvdata(iommu_pdev));
+ put_device(&iommu_pdev->dev); + return iommu_fwspec_add_ids(dev, &id, 1); }