From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id 49AE4C004E4 for ; Wed, 13 Jun 2018 07:46:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 006DC208AF for ; Wed, 13 Jun 2018 07:46:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 006DC208AF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754524AbeFMHqY (ORCPT ); Wed, 13 Jun 2018 03:46:24 -0400 Received: from mail.bootlin.com ([62.4.15.54]:42439 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754452AbeFMHqX (ORCPT ); Wed, 13 Jun 2018 03:46:23 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 8B6A120720; Wed, 13 Jun 2018 09:46:21 +0200 (CEST) Received: from localhost (AAubervilliers-681-1-37-30.w90-88.abo.wanadoo.fr [90.88.156.30]) by mail.bootlin.com (Postfix) with ESMTPSA id 5D79320012; Wed, 13 Jun 2018 09:46:21 +0200 (CEST) Date: Wed, 13 Jun 2018 09:46:21 +0200 From: Maxime Ripard To: Jernej Skrabec Cc: wens@csie.org, robh+dt@kernel.org, airlied@linux.ie, gustavo@padovan.org, maarten.lankhorst@linux.intel.com, seanpaul@chromium.org, mark.rutland@arm.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-sunxi@googlegroups.com Subject: Re: [PATCH v2 14/27] drm/sun4i: Don't check for panel or bridge on TV TCONs Message-ID: <20180613074621.5phumovcyymbkfbn@flea> References: <20180612200036.21483-1-jernej.skrabec@siol.net> <20180612200036.21483-15-jernej.skrabec@siol.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="on6p3lb7ylr4gu64" Content-Disposition: inline In-Reply-To: <20180612200036.21483-15-jernej.skrabec@siol.net> User-Agent: NeoMutt/20180512 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --on6p3lb7ylr4gu64 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 12, 2018 at 10:00:23PM +0200, Jernej Skrabec wrote: > TV TCONs are always connected to TV or HDMI encoder, so it doesn't make > sense to check if panel or bridge is connected to them. >=20 > Check if TCON has channel 0 and only then check for connected panel or > bridges. >=20 > Signed-off-by: Jernej Skrabec > --- > drivers/gpu/drm/sun4i/sun4i_tcon.c | 12 +++++++++--- > 1 file changed, 9 insertions(+), 3 deletions(-) >=20 > diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/s= un4i_tcon.c > index b1205a7bc20f..c9ffa5381185 100644 > --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c > +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c > @@ -1189,13 +1189,19 @@ static const struct component_ops sun4i_tcon_ops = =3D { > static int sun4i_tcon_probe(struct platform_device *pdev) > { > struct device_node *node =3D pdev->dev.of_node; > + const struct sun4i_tcon_quirks *quirks; > struct drm_bridge *bridge; > struct drm_panel *panel; > int ret; > =20 > - ret =3D drm_of_find_panel_or_bridge(node, 1, 0, &panel, &bridge); > - if (ret =3D=3D -EPROBE_DEFER) > - return ret; > + quirks =3D of_device_get_match_data(&pdev->dev); We should probably check ofr the pointer value before dereferencing it. 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