linux-kernel - Re: [PATCH v2] iommu/tegra-smmu: drop error checking for debugfs_create

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Date:   Mon, 27 Nov 2023 10:27:40 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Dario Binacchi <dario.binacchi@...rulasolutions.com>
Cc:     linux-kernel@...r.kernel.org, Baolu Lu <baolu.lu@...ux.intel.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krishna Reddy <vdumpa@...dia.com>,
        Robin Murphy <robin.murphy@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        Will Deacon <will@...nel.org>, iommu@...ts.linux.dev,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH v2] iommu/tegra-smmu: drop error checking for
 debugfs_create_dir()

On Wed, Oct 25, 2023 at 05:25:58PM +0200, Dario Binacchi wrote:
> The return value of debugfs_create_dir() should be checked using the
> IS_ERR() function. The patch, however, drops the check statement without
> fixing it because the subsequent functions (i. e. debugfs_create_file())
> can handle the case where `@...ent` is an error pointer.

This deserves a comment in the code explaining why no error checking is
needed.

Regards,

	Joerg