linux-kernel - Re: [PATCH 14/26] media: Convert entity ID allocation to new IDA API

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Date:   Mon, 30 Jul 2018 11:55:21 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Sakari Ailus <sakari.ailus@....fi>
Cc:     Matthew Wilcox <willy@...radead.org>, linux-kernel@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 14/26] media: Convert entity ID allocation to new IDA
 API

Em Tue, 24 Jul 2018 14:05:07 +0300
Sakari Ailus <sakari.ailus@....fi> escreveu:

> On Thu, Jun 21, 2018 at 02:28:23PM -0700, Matthew Wilcox wrote:
> > Removes a call to ida_pre_get().
> > 
> > Signed-off-by: Matthew Wilcox <willy@...radead.org>  
> 
> Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>

I'm assuming that the entire series will be applied together via some
other tree. So:

Acked-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

> 
> > ---
> >  drivers/media/media-device.c | 16 +++++-----------
> >  1 file changed, 5 insertions(+), 11 deletions(-)
> > 
> > diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> > index ae59c3177555..d51088bcd735 100644
> > --- a/drivers/media/media-device.c
> > +++ b/drivers/media/media-device.c
> > @@ -575,18 +575,12 @@ int __must_check media_device_register_entity(struct media_device *mdev,
> >  	entity->num_links = 0;
> >  	entity->num_backlinks = 0;
> >  
> > -	if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL))
> > -		return -ENOMEM;
> > -
> > -	mutex_lock(&mdev->graph_mutex);
> > -
> > -	ret = ida_get_new_above(&mdev->entity_internal_idx, 1,
> > -				&entity->internal_idx);
> > -	if (ret < 0) {
> > -		mutex_unlock(&mdev->graph_mutex);
> > +	ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL);
> > +	if (ret < 0)
> >  		return ret;
> > -	}
> > +	entity->internal_idx = ret;
> >  
> > +	mutex_lock(&mdev->graph_mutex);
> >  	mdev->entity_internal_idx_max =
> >  		max(mdev->entity_internal_idx_max, entity->internal_idx);
> >  
> > @@ -632,7 +626,7 @@ static void __media_device_unregister_entity(struct media_entity *entity)
> >  	struct media_interface *intf;
> >  	unsigned int i;
> >  
> > -	ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx);
> > +	ida_free(&mdev->entity_internal_idx, entity->internal_idx);
> >  
> >  	/* Remove all interface links pointing to this entity */
> >  	list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) {  
> 



Thanks,
Mauro