Re: [PATCH] drm/rcar-du: Fix error check when retrieving crtc state

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jun 18, 2019 at 10:26:52AM +0300, Laurent Pinchart wrote:
> Hi Sean,
> 
> Thank you for the patch.
> 
> On Mon, Jun 17, 2019 at 02:15:42PM -0400, Sean Paul wrote:
> > From: Sean Paul <seanpaul@xxxxxxxxxxxx>
> > 
> > drm_atomic_get_crtc_state() returns an error pointer when it fails, so
> > the null check is doing nothing here.
> > 
> > Credit to 0-day/Dan Carpenter for reporting this.
> > 
> > Fixes: 6f3b62781bbd ("drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state")
> > Cc: Daniel Vetter <daniel@xxxxxxxx>
> > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> > Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
> > Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> > Cc: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> > Cc: Eric Anholt <eric@xxxxxxxxxx>
> > Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> [for rcar lvds]
> > Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
> > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> > Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> > Cc: Sean Paul <sean@xxxxxxxxxx>
> > Cc: David Airlie <airlied@xxxxxxxx>
> > Cc: Lyude Paul <lyude@xxxxxxxxxx>
> > Cc: Karol Herbst <karolherbst@xxxxxxxxx>
> > Cc: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
> > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
> > Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> 
> I have no pending conflicting changes for rcar_lvds.c. Do you plan to
> merge this through drm-misc ?

Thanks for your review!

Yeah, since the bug is only in drm-misc-next, this will also go there. Speaking
of which, I just applied it :-)

Sean

> 
> > ---
> >  drivers/gpu/drm/rcar-du/rcar_lvds.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > index f2a5d4d997073..1c62578590f46 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > @@ -115,8 +115,8 @@ static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
> >  
> >  	/* We're not allowed to modify the resolution. */
> >  	crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc);
> > -	if (!crtc_state)
> > -		return -EINVAL;
> > +	if (IS_ERR(crtc_state))
> > +		return PTR_ERR(crtc_state);
> >  
> >  	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
> >  	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
> 
> -- 
> Regards,
> 
> Laurent Pinchart

-- 
Sean Paul, Software Engineer, Google / Chromium OS
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel




[Index of Archives]     [Linux DRI Users]     [Linux Intel Graphics]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux