linux-kernel - Re: [PATCH RESEND 2/3] drm/i915: check for return value

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Message-ID: <20151209113912.GA24852@sudip-pc>
Date:	Wed, 9 Dec 2015 17:09:12 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>
Subject: Re: [PATCH RESEND 2/3] drm/i915: check for return value

On Thu, Oct 08, 2015 at 04:29:31PM +0200, Daniel Vetter wrote:
> On Thu, Oct 08, 2015 at 07:28:00PM +0530, Sudip Mukherjee wrote:
> > We were not checking the return value of drm_encoder_init() which can
> > fail. And if it fails then we will be working with an uninitialized
> > encoder.
> > 
> > Cc: Daniel Vetter <daniel.vetter@...el.com>
> > Cc: Jani Nikula <jani.nikula@...ux.intel.com>
> > Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> 
> Queued for -next, thanks for the patch.
> -Daniel

Hi Daniel,
It is still not there in linux-next. Still applies cleanly on
next-20151209.

regards
sudip

> 
> > ---
> > 
> > Sent on 27/07/2015
> > 
> >  drivers/gpu/drm/i915/intel_dp.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> > index 18bcfbe..2a8b47e 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -6174,8 +6174,9 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> >  	intel_encoder = &intel_dig_port->base;
> >  	encoder = &intel_encoder->base;
> >  
> > -	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
> > -			 DRM_MODE_ENCODER_TMDS);
> > +	if (drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
> > +			     DRM_MODE_ENCODER_TMDS))
> > +		goto err_encoder_init;
> >  
> >  	intel_encoder->compute_config = intel_dp_compute_config;
> >  	intel_encoder->disable = intel_disable_dp;
> > @@ -6224,6 +6225,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> >  
> >  err_init_connector:
> >  	drm_encoder_cleanup(encoder);
> > +err_encoder_init:
> >  	kfree(intel_connector);
> >  err_connector_alloc:
> >  	kfree(intel_dig_port);
> > -- 
> > 1.9.1
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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