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

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Date:   Tue, 8 Mar 2022 13:13:05 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Stephen Boyd <swboyd@...omium.org>,
        "Sean O'Brien" <seobrien@...omium.org>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] HID: vivaldi: fix sysfs attributes leak

On Tue, Mar 1, 2022 at 6:31 AM Jiri Kosina <jikos@...nel.org> wrote:
>
> 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, are you planning to send this for 5.17 or 5.18?

Thanks.

-- 
Dmitry