linux-kernel - Re: [PATCH v5 3/7] usb: typec: mux: Check dev_set

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Date:   Tue, 26 Apr 2022 12:13:31 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        USB <linux-usb@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH v5 3/7] usb: typec: mux: Check dev_set_name() return value

On Sat, Apr 23, 2022 at 1:25 AM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> It's possible that dev_set_name() returns -ENOMEM, catch and handle this.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Fixes: 3370db35193b ("usb: typec: Registering real device entries for the muxes")
> Reported-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>
> Changes since v4:
> - Added Fixes tag
>
>  drivers/usb/typec/mux.c | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
> index c8340de0ed49..d2aaf294b649 100644
> --- a/drivers/usb/typec/mux.c
> +++ b/drivers/usb/typec/mux.c
> @@ -131,8 +131,11 @@ typec_switch_register(struct device *parent,
>         sw->dev.class = &typec_mux_class;
>         sw->dev.type = &typec_switch_dev_type;
>         sw->dev.driver_data = desc->drvdata;
> -       dev_set_name(&sw->dev, "%s-switch",
> -                    desc->name ? desc->name : dev_name(parent));
> +       ret = dev_set_name(&sw->dev, "%s-switch", desc->name ? desc->name : dev_name(parent));
> +       if (ret) {
> +               put_device(&sw->dev);
> +               return ERR_PTR(ret);
> +       }
>
>         ret = device_add(&sw->dev);
>         if (ret) {
> @@ -338,8 +341,11 @@ typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
>         mux->dev.class = &typec_mux_class;
>         mux->dev.type = &typec_mux_dev_type;
>         mux->dev.driver_data = desc->drvdata;
> -       dev_set_name(&mux->dev, "%s-mux",
> -                    desc->name ? desc->name : dev_name(parent));
> +       ret = dev_set_name(&mux->dev, "%s-mux", desc->name ? desc->name : dev_name(parent));
> +       if (ret) {
> +               put_device(&mux->dev);
> +               return ERR_PTR(ret);
> +       }
>
>         ret = device_add(&mux->dev);
>         if (ret) {
> --
> 2.35.1
>


-- 
With Best Regards,
Andy Shevchenko