linux-kernel - Re: 回复: [PATCH v1 5/7] staging: media: starfive: Add ISP raw video device

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Message-ID: <17e9c68f-0019-4b76-908b-6763fb24eb22@moroto.mountain>
Date: Thu, 7 Mar 2024 10:55:15 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Changhuang Liang <changhuang.liang@...rfivetech.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Jack Zhu <jack.zhu@...rfivetech.com>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-staging@...ts.linux.dev" <linux-staging@...ts.linux.dev>
Subject: Re: 回复: [PATCH v1 5/7] staging:
 media: starfive: Add ISP raw video device

On Thu, Mar 07, 2024 at 02:13:50AM +0000, Changhuang Liang wrote:
> Hi, Dan
> 
> [...]
> > >
> > > +err_rm_links0:
> > > +	media_entity_remove_links(&isp_dev->subdev.entity);
> > 
> > I don't think this line is correct.  I think we only need to remove
> > &cap_yuv->video.vdev.entity.
> > 
> 
> The instance I refer to needs to clear both the source entity and the sink entity. See
> https://elixir.bootlin.com/linux/v6.8-rc7/source/drivers/media/platform/verisilicon/hantro_drv.c#L855
> 

Oh yeah.  It's the same in v4l2_m2m_register_media_controller().

regards,
dan carpenter