From patchwork Fri Mar 13 16:20:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 11437395 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AC6201667 for ; Fri, 13 Mar 2020 16:21:38 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 94DB12072C for ; Fri, 13 Mar 2020 16:21:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94DB12072C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 80B146EC1E; Fri, 13 Mar 2020 16:21:37 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA43A6EC1C; Fri, 13 Mar 2020 16:21:35 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Mar 2020 09:21:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,549,1574150400"; d="scan'208";a="261936701" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by orsmga002.jf.intel.com with SMTP; 13 Mar 2020 09:21:18 -0700 Received: by stinkbox (sSMTP sendmail emulation); Fri, 13 Mar 2020 18:21:17 +0200 From: Ville Syrjala To: dri-devel@lists.freedesktop.org Subject: [PATCH 7/9] drm/edid: Don't include ext block csum in DispID size Date: Fri, 13 Mar 2020 18:20:52 +0200 Message-Id: <20200313162054.16009-8-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200313162054.16009-1-ville.syrjala@linux.intel.com> References: <20200313162054.16009-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Ville Syrjälä The EDID extension block checksum byte is not part of the actual DispID data, so don't use it in validate_displayid(). Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/drm_edid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3067be710e5b..f1ba06396c0a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3222,7 +3222,8 @@ static u8 *drm_find_displayid_extension(const struct edid *edid, if (!displayid) return NULL; - *length = EDID_LENGTH; + /* EDID extensions block checksum isn't for us */ + *length = EDID_LENGTH - 1; *idx = 1; ret = validate_displayid(displayid, *length, *idx);