linux-kernel - Re: [PATCH] usb: ulpi: Fix debugfs directory leak

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Message-ID: <ZbkFL53fU+q7FHEU@kuha.fi.intel.com>
Date: Tue, 30 Jan 2024 16:18:23 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Sean Anderson <sean.anderson@...o.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] usb: ulpi: Fix debugfs directory leak

On Fri, Jan 26, 2024 at 05:38:00PM -0500, Sean Anderson wrote:
> The ULPI per-device debugfs root is named after the ulpi device's
> parent, but ulpi_unregister_interface tries to remove a debugfs
> directory named after the ulpi device itself. This results in the
> directory sticking around and preventing subsequent (deferred) probes
> from succeeding. Change the directory name to match the ulpi device.
> 
> Fixes: bd0a0a024f2a ("usb: ulpi: Add debugfs support")
> Cc: stable@...r.kernel.org
> Signed-off-by: Sean Anderson <sean.anderson@...o.com>

Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
> 
>  drivers/usb/common/ulpi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
> index 84d91b1c1eed..0886b19d2e1c 100644
> --- a/drivers/usb/common/ulpi.c
> +++ b/drivers/usb/common/ulpi.c
> @@ -301,7 +301,7 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
>  		return ret;
>  	}
>  
> -	root = debugfs_create_dir(dev_name(dev), ulpi_root);
> +	root = debugfs_create_dir(dev_name(&ulpi->dev), ulpi_root);
>  	debugfs_create_file("regs", 0444, root, ulpi, &ulpi_regs_fops);
>  
>  	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
> -- 
> 2.35.1.1320.gc452695387.dirty

-- 
heikki