linux-kernel - Re: [PATCH] drm/bridge: anx7625: Fix not correct get property counts

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Message-ID: <20220311025920.GA1346668@anxtwsw-Precision-3640-Tower>
Date:   Fri, 11 Mar 2022 10:59:20 +0800
From:   Xin Ji <xji@...logixsemi.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, qwen@...logixsemi.com,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        mliu@...logixsemi.com, hsinyi@...omium.org, bliang@...logixsemi.com
Subject: Re: [PATCH] drm/bridge: anx7625: Fix not correct get property counts

On Thu, Mar 10, 2022 at 07:53:59PM +0100, Sam Ravnborg wrote:
> Hi Xin,
> 
> On Thu, Mar 10, 2022 at 05:16:53PM +0800, Xin Ji wrote:
> > The property length which returns from "of_get_property", divided by
> > sizeof(int) to get the total property counts.
> > 
> > Fixes: fd0310b6fe7d ("drm/bridge: anx7625: add MIPI DPI input feature")
> > 
> > Signed-off-by: Xin Ji <xji@...logixsemi.com>
> > ---
> >  drivers/gpu/drm/bridge/analogix/anx7625.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > index c6a9a02ed762..87081d5b408d 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > @@ -1594,6 +1594,7 @@ static int anx7625_get_swing_setting(struct device *dev,
> >  
> >  	if (of_get_property(dev->of_node,
> >  			    "analogix,lane0-swing", &num_regs)) {
> > +		num_regs /= sizeof(int);
> 
> Since the property is an array maybe use: of_property_read_u8_array()
> 
> 	Sam
Hi Sam, OK, I'll use it to get property data.

Thanks,
Xin