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[217.229.16.121]) by smtp.gmail.com with ESMTPSA id a15sm8008320ejj.104.2020.05.22.05.59.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2020 05:59:14 -0700 (PDT) Date: Fri, 22 May 2020 14:59:13 +0200 From: Thierry Reding To: Nicolin Chen Cc: airlied@linux.ie, daniel@ffwll.ch, jonathanh@nvidia.com, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/tegra: hub: Do not enable orphaned window group Message-ID: <20200522125913.GK2163848@ulmo> References: <20200519090301.32689-1-nicoleotsuka@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="M9kwpIYUMbI/2cCx" Content-Disposition: inline In-Reply-To: <20200519090301.32689-1-nicoleotsuka@gmail.com> User-Agent: Mutt/1.13.1 (2019-12-14) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --M9kwpIYUMbI/2cCx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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. >=20 > So this patch simply adds a check to make sure that window group has > a valid parent before running into tegra_windowgroup_enable/disable. >=20 > Signed-off-by: Nicolin Chen > --- > drivers/gpu/drm/tegra/hub.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) Applied, thanks. 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