linux-hardening - Re: [PATCH v3 net-next 8/8] mfd: zl3073x: Register DPLL sub-device during init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250417162044.GG372032@google.com>
Date: Thu, 17 Apr 2025 17:20:44 +0100
From: Lee Jones <lee@...nel.org>
To: Ivan Vecera <ivecera@...hat.com>
Cc: netdev@...r.kernel.org, Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
	Jiri Pirko <jiri@...nulli.us>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Prathosh Satish <Prathosh.Satish@...rochip.com>,
	Kees Cook <kees@...nel.org>, Andy Shevchenko <andy@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Schmidt <mschmidt@...hat.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 net-next 8/8] mfd: zl3073x: Register DPLL sub-device
 during init

On Wed, 16 Apr 2025, Ivan Vecera wrote:

> Register DPLL sub-devices to expose this functionality provided
> by ZL3073x chip family. Each sub-device represents one of the provided
> DPLL channels.
> 
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> ---
>  drivers/mfd/zl3073x-core.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/mfd/zl3073x-core.c b/drivers/mfd/zl3073x-core.c
> index 0bd31591245a2..fda77724a8452 100644
> --- a/drivers/mfd/zl3073x-core.c
> +++ b/drivers/mfd/zl3073x-core.c
> @@ -6,6 +6,7 @@
>  #include <linux/device.h>
>  #include <linux/export.h>
>  #include <linux/math64.h>
> +#include <linux/mfd/core.h>
>  #include <linux/mfd/zl3073x.h>
>  #include <linux/mfd/zl3073x_regs.h>
>  #include <linux/module.h>
> @@ -774,6 +775,20 @@ int zl3073x_dev_probe(struct zl3073x_dev *zldev,
>  	if (rc)
>  		return rc;
>  
> +	/* Add DPLL sub-device cell for each DPLL channel */
> +	for (i = 0; i < chip_info->num_channels; i++) {
> +		struct mfd_cell dpll_dev = MFD_CELL_BASIC("zl3073x-dpll", NULL,
> +							  NULL, 0, i);

Create a static one of these with the maximum amount of channels.

> +
> +		rc = devm_mfd_add_devices(zldev->dev, PLATFORM_DEVID_AUTO,
> +					  &dpll_dev, 1, NULL, 0, NULL);

Then pass chip_info->num_channels as the 4th argument.

> +		if (rc) {
> +			dev_err_probe(zldev->dev, rc,
> +				      "Failed to add DPLL sub-device\n");
> +			return rc;
> +		}
> +	}
> +
>  	/* Register the device as devlink device */
>  	devlink = priv_to_devlink(zldev);
>  	devlink_register(devlink);
> -- 
> 2.48.1
> 

-- 
Lee Jones [李琼斯]