From patchwork Tue May 30 09:08:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13259571 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E54DCC7EE2E for ; Tue, 30 May 2023 09:09:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AE46B10E37F; Tue, 30 May 2023 09:09:43 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8348910E387; Tue, 30 May 2023 09:09:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685437767; x=1716973767; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gp5i1XUPWwbu/ObsAVq3Y0DeWLJx/RgdaIYVPC3uyu4=; b=EZN7W19ZzFa20rc9dA06PBe6Cc+YOuMK+pi1nENlLMC7H4dBx8gLa0be bsKo3ePzDvPjZgazo+454J1VwWtVmfFJU5HQYg6PNmU9TuItDfxLGXfrR 5p8tPvKZ9oKyiUj7f99qD/78yGFeHNFj+DF9d4U+nquMLxDoXl8y7xfda npx+9c1ITW8wLIoI3atCS5r32c9GE92IoWlFGIjpyCy6T2oiLF4XDX02W qecXdhC4wDJ2TpFcDr30n0jyf0HMC9LqORLVfXNByFj5eNo2Fplmi4ECP hWnbQpvz3hj+8l3Fq7x7ktn85BmHowhT82DjMfl5X0/X5fAnzHoKOQZlf g==; X-IronPort-AV: E=McAfee;i="6600,9927,10725"; a="354872638" X-IronPort-AV: E=Sophos;i="6.00,203,1681196400"; d="scan'208";a="354872638" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 May 2023 02:09:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10725"; a="683875232" X-IronPort-AV: E=Sophos;i="6.00,203,1681196400"; d="scan'208";a="683875232" Received: from kleve-mobl1.ger.corp.intel.com (HELO localhost) ([10.252.47.8]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 May 2023 02:09:25 -0700 From: Jani Nikula To: intel-gfx@lists.freedesktop.org Subject: [PATCH v2 11/13] drm/edid: make drm_edid_duplicate() safe to call with NULL parameter Date: Tue, 30 May 2023 12:08:23 +0300 Message-Id: <1ae8923d39a5abd0260fdf7f9cc54c5e046e70d3.1685437501.git.jani.nikula@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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: jani.nikula@intel.com, Ankit Nautiyal , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" It's a bit tedious to check for NULL before calling drm_edid_duplicate(). Make it handle NULL parameter graciously. Reviewed-by: Ankit Nautiyal Signed-off-by: Jani Nikula --- drivers/gpu/drm/drm_edid.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 941f3d53a701..e0dbd9140726 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2881,6 +2881,9 @@ EXPORT_SYMBOL(drm_edid_read_switcheroo); */ struct edid *drm_edid_duplicate(const struct edid *edid) { + if (!edid) + return NULL; + return kmemdup(edid, edid_size(edid), GFP_KERNEL); } EXPORT_SYMBOL(drm_edid_duplicate);