linux-kernel - Re: [Patch v3 1/3] media: ov5640: add PIXEL

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Date:   Mon, 7 Oct 2019 10:17:03 -0500
From:   Benoit Parrot <bparrot@...com>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>
CC:     Hans Verkuil <hverkuil@...all.nl>,
        Jacopo Mondi <jacopo@...ndi.org>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [Patch v3 1/3] media: ov5640: add PIXEL_RATE control

Sakari Ailus <sakari.ailus@...ux.intel.com> wrote on Mon [2019-Oct-07 11:03:20 +0300]:
> On Fri, Oct 04, 2019 at 12:24:16PM -0500, Benoit Parrot wrote:
> > @@ -2657,6 +2669,12 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
> >  	/* we can use our own mutex for the ctrl lock */
> >  	hdl->lock = &sensor->lock;
> >  
> > +	/* Clock related controls */
> > +	ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
> > +					      0, INT_MAX, 1,
> > +					      ov5640_calc_pixel_rate(sensor));
> > +	ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> 
> Please check ctrls->pixel_rate first; it may be NULL here.

How about I just move this line below "if (hdl->error)" instead?

Benoit
> 
> > +
> >  	/* Auto/manual white balance */
> >  	ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
> >  					   V4L2_CID_AUTO_WHITE_BALANCE,
> 
> -- 
> Sakari Ailus
> sakari.ailus@...ux.intel.com