linux-kernel - Re: [PATCH] drm: fix ifnullfree.cocci warnings

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Message-ID: <alpine.DEB.2.21.2003311342480.3188@hadrien>
Date:   Tue, 31 Mar 2020 13:43:04 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Daniel Vetter <daniel@...ll.ch>
cc:     Daniel Vetter <daniel.vetter@...ll.ch>, kbuild-all@...ts.01.org,
        Sam Ravnborg <sam@...nborg.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: fix ifnullfree.cocci warnings



On Tue, 31 Mar 2020, Daniel Vetter wrote:

> On Fri, Mar 27, 2020 at 09:11:44AM +0100, Julia Lawall wrote:
> > NULL check before kfree is not needed.
> >
> > Generated by: scripts/coccinelle/free/ifnullfree.cocci
> >
> > Fixes: c6603c740e0e ("drm: add managed resources tied to drm_device")
> > Signed-off-by: kbuild test robot <lkp@...el.com>
> > Signed-off-by: Julia Lawall <julia.lawall@...ia.fr>
> > ---
> >
> > tree:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
>
> Hm this doesn't apply anymore, the patch is for an interim state (because
> bisectability). Care to regen (the pattern still exists), I'm happy to
> apply.

Maybe 0-day will produce it again?

julia

> -Daniel
>
> > head:   9e1ed9fb1eb0a4bc43a26365c592d3095286038b
> > commit: c6603c740e0e3492c9c95fdab833375bf7117b6b [1587/1636] drm: add managed resources tied to drm_device
> > :::::: branch date: 8 hours ago
> > :::::: commit date: 9 hours ago
> >
> > Up to you, if you tihnk it is useful...
> >
> >  drm_drv.c |    3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > --- a/drivers/gpu/drm/drm_drv.c
> > +++ b/drivers/gpu/drm/drm_drv.c
> > @@ -837,8 +837,9 @@ static void drm_dev_release(struct kref
> >  	if (!dev->driver->release && !dev->managed.final_kfree) {
> >  		WARN_ON(!list_empty(&dev->managed.resources));
> >  		kfree(dev);
> > -	} else if (dev->managed.final_kfree)
> > +	} else {
> >  		kfree(dev->managed.final_kfree);
> > +	}
> >  }
> >
> >  /**
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
>