The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x c08934a61201db8f1d1c66fcc63fb2eb526b656d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2026010546-tannery-spinning-db08@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c08934a61201db8f1d1c66fcc63fb2eb526b656d Mon Sep 17 00:00:00 2001 From: Johan Hovold johan@kernel.org Date: Mon, 20 Oct 2025 06:53:18 +0200 Subject: [PATCH] iommu/tegra: fix device leak on probe_device()

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

Note that commit 9826e393e4a8 ("iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find") fixed the leak in an error path, but the reference is still leaking on success.

Fixes: 891846516317 ("memory: Add NVIDIA Tegra memory controller support") Cc: stable@vger.kernel.org # 3.19: 9826e393e4a8 Cc: Miaoqian Lin linmq006@gmail.com Acked-by: Robin Murphy robin.murphy@arm.com Acked-by: Thierry Reding treding@nvidia.com Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Joerg Roedel joerg.roedel@amd.com

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 336e0a3ff41f..c391e7f2cde6 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -830,10 +830,9 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np) return NULL;

mc = platform_get_drvdata(pdev); - if (!mc) { - put_device(&pdev->dev); + put_device(&pdev->dev); + if (!mc) return NULL; - }

return mc->smmu; }