Make sure to drop the reference taken to the iommu platform device when looking up its driver data during probe_device().
Fixes: 891846516317 ("memory: Add NVIDIA Tegra memory controller support") Cc: stable@vger.kernel.org # 3.19 Cc: Thierry Reding treding@nvidia.com Signed-off-by: Johan Hovold johan@kernel.org --- drivers/iommu/tegra-smmu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 36cdd5fbab07..f6f26a072820 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; }