linux-kernel - Re: [PATCH v3] mtd: spi-nor: fix memory leak when using debugfs

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Date:   Wed, 08 Feb 2023 16:28:45 +0100
From:   Michael Walle <michael@...le.cc>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v3] mtd: spi-nor: fix memory leak when using
 debugfs_lookup()

> +static void __exit spi_nor_module_exit(void)
> +{
> +	spi_nor_debugfs_shutdown();
> +	spi_mem_driver_unregister(&spi_nor_driver);

Hm, does the order matter here? I didn't test it, but this will
lead to:

rootdir = debugfs_create_dir("spi-nor", NULL);
nor->debugfs_root = debugfs_create_dir("spi0", rootdir);
debugfs_remove(rootdir);
debugfs_remove(nor->debugfs_root);

If that's ok, then this looks good.

-michael