linux-kernel - Re: [PATCH v4 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe

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Message-ID: <20201002185828.GC29706@Asurada-Nvidia>
Date:   Fri, 2 Oct 2020 11:58:29 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     thierry.reding@...il.com, joro@...tes.org, vdumpa@...dia.com,
        jonathanh@...dia.com, linux-tegra@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device()

On Fri, Oct 02, 2020 at 06:02:18PM +0300, Dmitry Osipenko wrote:
> 02.10.2020 09:08, Nicolin Chen пишет:
> >  static int tegra_smmu_of_xlate(struct device *dev,
> >  			       struct of_phandle_args *args)
> >  {
> > +	struct platform_device *iommu_pdev = of_find_device_by_node(args->np);
> > +	struct tegra_mc *mc = platform_get_drvdata(iommu_pdev);
> >  	u32 id = args->args[0];
> >  
> > +	of_node_put(args->np);
> 
> of_find_device_by_node() takes device reference and not the np
> reference. This is a bug, please remove of_node_put().

Looks like so. Replacing it with put_device(&iommu_pdev->dev);

Thanks