linux-kernel - Re: [PATCH] drm/tegra: hub: Do not enable orphaned window group

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Message-ID: <20200522125913.GK2163848@ulmo>
Date:   Fri, 22 May 2020 14:59:13 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     airlied@...ux.ie, daniel@...ll.ch, jonathanh@...dia.com,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/tegra: hub: Do not enable orphaned window group

On Tue, May 19, 2020 at 02:03:01AM -0700, Nicolin Chen wrote:
> Though the unconditional enable/disable code is not a final solution,
> we don't want to run into a NULL pointer situation when window group
> doesn't link to its DC parent if the DC is disabled in Device Tree.
> 
> So this patch simply adds a check to make sure that window group has
> a valid parent before running into tegra_windowgroup_enable/disable.
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka@...il.com>
> ---
>  drivers/gpu/drm/tegra/hub.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)

Applied, thanks.

Thierry

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