linux-kernel - RE: [PATCH v4 4/4] extcon: Added extcon_alloc_groups to simplify extcon register function

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Date:   Mon, 20 Mar 2023 12:12:33 +0900
From:   "Bumwoo Lee" <bw365.lee@...sung.com>
To:     "'Chanwoo Choi'" <cwchoi00@...il.com>,
        "'MyungJoo Ham'" <myungjoo.ham@...sung.com>,
        "'Chanwoo Choi'" <cw00.choi@...sung.com>,
        <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v4 4/4] extcon: Added extcon_alloc_groups to simplify
 extcon register function


> -----Original Message-----
> From: Chanwoo Choi <cwchoi00@...il.com>
> Sent: Monday, March 13, 2023 8:08 PM
> To: Bumwoo Lee <bw365.lee@...sung.com>; MyungJoo Ham
> <myungjoo.ham@...sung.com>; Chanwoo Choi <cw00.choi@...sung.com>; linux-
> kernel@...r.kernel.org
> Subject: Re: [PATCH v4 4/4] extcon: Added extcon_alloc_groups to simplify
> extcon register function
> 
> On 23. 3. 2. 18:01, Bumwoo Lee wrote:
> > The alloc groups is functionalized from extcon_dev_register.
> >
> > Signed-off-by: Bumwoo Lee <bw365.lee@...sung.com>
> > ---
> >  drivers/extcon/extcon.c | 58
> > +++++++++++++++++++++++++----------------
> >  1 file changed, 36 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index
> > 321988231806..c366a7988daf 100644
> > --- a/drivers/extcon/extcon.c
> > +++ b/drivers/extcon/extcon.c
> > @@ -1181,6 +1181,39 @@ static int extcon_alloc_muex(struct extcon_dev
> *edev)
> >  	return 0;
> >  }
> >
> > +/**
> > + * extcon_alloc_groups() - alloc the groups for extcon device
> > + * @edev:	extcon device
> > + *
> > + * Returns 0 if success or error number if fail.
> > + */
> > +static int extcon_alloc_groups(struct extcon_dev *edev) {
> > +	int index;
> > +
> 
> ditto.
> 
> 	if (!edev)
> 		return -EINVAL;
> 
> > +	if (!edev->max_supported)
> > +		return 0;
> > +
> > +	edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,
> > +			sizeof(struct attribute_group *),
> > +			GFP_KERNEL);
> > +	if (!edev->extcon_dev_type.groups)
> > +		return -ENOMEM;
> > +
> > +	edev->extcon_dev_type.name = dev_name(&edev->dev);
> > +	edev->extcon_dev_type.release = dummy_sysfs_dev_release;
> > +
> > +	for (index = 0; index < edev->max_supported; index++)
> > +		edev->extcon_dev_type.groups[index] = &edev-
> >cables[index].attr_g;
> > +
> > +	if (edev->mutually_exclusive)
> > +		edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;
> > +
> > +	edev->dev.type = &edev->extcon_dev_type;
> > +
> > +	return 0;
> > +}
> > +
> >  /**
> >   * extcon_dev_register() - Register an new extcon device
> >   * @edev:	the extcon device to be registered
> > @@ -1236,28 +1269,9 @@ int extcon_dev_register(struct extcon_dev *edev)
> >  	if (ret < 0)
> >  		goto err_alloc_muex;
> >
> > -	if (edev->max_supported) {
> > -		edev->extcon_dev_type.groups =
> > -			kcalloc(edev->max_supported + 2,
> > -				sizeof(struct attribute_group *),
> > -				GFP_KERNEL);
> > -		if (!edev->extcon_dev_type.groups) {
> > -			ret = -ENOMEM;
> > -			goto err_alloc_groups;
> > -		}
> > -
> > -		edev->extcon_dev_type.name = dev_name(&edev->dev);
> > -		edev->extcon_dev_type.release = dummy_sysfs_dev_release;
> > -
> > -		for (index = 0; index < edev->max_supported; index++)
> > -			edev->extcon_dev_type.groups[index] =
> > -				&edev->cables[index].attr_g;
> > -		if (edev->mutually_exclusive)
> > -			edev->extcon_dev_type.groups[index] =
> > -				&edev->attr_g_muex;
> > -
> > -		edev->dev.type = &edev->extcon_dev_type;
> > -	}
> > +	ret = extcon_alloc_groups(edev);
> > +	if (ret < 0)
> > +		goto err_alloc_groups;
> >
> >  	spin_lock_init(&edev->lock);
> >  	if (edev->max_supported) {
> 
> --

Thank you for the review and I will send a new patch including what you
mentioned soon

Thanks,


> Best Regards,
> Samsung Electronics
> Chanwoo Choi