linux-kernel - Re: [PATCH] HID: vivaldi: fix sysfs attributes leak

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Date:   Tue, 1 Mar 2022 15:31:46 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Sean O'Brien <seobrien@...omium.org>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: vivaldi: fix sysfs attributes leak

On Fri, 25 Feb 2022, Dmitry Torokhov wrote:

> The driver creates the top row map sysfs attribute in input_configured()
> method; unfortunately we do not have a callback that is executed when HID
> interface is unbound, thus we are leaking these sysfs attributes, for
> example when device is disconnected.
> 
> To fix it let's switch to managed version of adding sysfs attributes which
> will ensure that they are destroyed when the driver is unbound.
> 
> Fixes: 14c9c014babe ("HID: add vivaldi HID driver")
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
> 
> Compiled only.
> 
>  drivers/hid/hid-vivaldi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/hid-vivaldi.c b/drivers/hid/hid-vivaldi.c
> index efa6140915f4..42ceb2058a09 100644
> --- a/drivers/hid/hid-vivaldi.c
> +++ b/drivers/hid/hid-vivaldi.c
> @@ -144,7 +144,7 @@ static void vivaldi_feature_mapping(struct hid_device *hdev,
>  static int vivaldi_input_configured(struct hid_device *hdev,
>  				    struct hid_input *hidinput)
>  {
> -	return sysfs_create_group(&hdev->dev.kobj, &input_attribute_group);
> +	return devm_device_add_group(&hdev->dev, &input_attribute_group);
>  }
>  
>  static const struct hid_device_id vivaldi_table[] = {

Applied, thanks Dmitry.

-- 
Jiri Kosina
SUSE Labs