linux-kernel - Re: [PATCH 1/2] drm/imx: ipuv3-crtc: Return error if ipu_plane

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Date:	Fri, 6 Nov 2015 18:25:39 +0800
From:	Liu Ying <Ying.Liu@...escale.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
	<airlied@...ux.ie>
Subject: Re: [PATCH 1/2] drm/imx: ipuv3-crtc: Return error if
 ipu_plane_init() fails for primary plane

On Fri, Nov 06, 2015 at 11:05:54AM +0100, Philipp Zabel wrote:
> Hi Liu,
> 
> Am Mittwoch, den 04.11.2015, 18:15 +0800 schrieb Liu Ying:
> > For primary plane initialization failure cases, ipu_plane_init() may return
> > a pointer encoded by ERR_PTR(). So, we should bailout instead of use that
> > pointer blindly.
> > 
> > Signed-off-by: Liu Ying <Ying.Liu@...escale.com>
> > ---
> >  drivers/gpu/drm/imx/ipuv3-crtc.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
> > index 7bc8301..8d68697 100644
> > --- a/drivers/gpu/drm/imx/ipuv3-crtc.c
> > +++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
> > @@ -370,6 +370,10 @@ static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
> >  	id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
> >  	ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
> >  					    pdata->dma[0], dp, BIT(id), true);
> > +	if (IS_ERR(ipu_crtc->plane[0])) {
> > +		ret = PTR_ERR(ipu_crtc->plane[0]);
> > +		goto err_put_resources;
> 
> That should be "goto err_remove_crtc;"

Ah, yes, you're right.  I'll fix this.
BTW, there is nothing to free the ipu_plane allocated in ipu_plane_init() in
case something goes wrong after ipu_plane_init().  Of course, we may fix this
with another patch.

Thanks,
Liu Ying

> 
> regards
> Philipp
> 
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