linux-kernel - Re: [RFC 07/13] v4l2: device_register_subdev

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Message-ID: <20170214220256.GN16975@valkosipuli.retiisi.org.uk>
Date:   Wed, 15 Feb 2017 00:02:57 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Pavel Machek <pavel@....cz>
Cc:     sre@...nel.org, pali.rohar@...il.com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, laurent.pinchart@...asonboard.com,
        mchehab@...nel.org, ivo.g.dimitrov.75@...il.com
Subject: Re: [RFC 07/13] v4l2: device_register_subdev_nodes: allow calling
 multiple times

Hi Pavel and Sebastian,

On Tue, Feb 14, 2017 at 02:40:00PM +0100, Pavel Machek wrote:
> From: Sebastian Reichel <sre@...nel.org>
> 
> Without this, exposure / gain controls do not work in the camera application.

:-)

> 
> Signed-off-by: Sebastian Reichel <sre@...nel.org>
> Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
> Signed-off-by: Pavel Machek <pavel@....cz>
> ---
>  drivers/media/v4l2-core/v4l2-device.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c
> index f364cc1..b3afbe8 100644
> --- a/drivers/media/v4l2-core/v4l2-device.c
> +++ b/drivers/media/v4l2-core/v4l2-device.c
> @@ -235,6 +235,9 @@ int v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
>  		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE))
>  			continue;
>  
> +		if(sd->devnode)
> +			continue;

This has been recognised as a problem but you're the first to submit a patch
I believe. Please add an appropriate description. :-)

s/if\(/if (/

I think this one should go in before the rest.

> +
>  		vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
>  		if (!vdev) {
>  			err = -ENOMEM;

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk