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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D0B4C433E7 for ; Mon, 31 Aug 2020 15:30:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 130ED206F0 for ; Mon, 31 Aug 2020 15:30:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598887840; bh=SjN8iminpZiXmeBHQ3gKw/eRxDZLxp1Xr4nXn7Ml+q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=owSsCCmwO4U8ZDPxCZdcoFEj6UCoCGGmfwW3X8z6Jhgx5DrjjB9YRRuVyd6BMkpRl uLBwnX5pmWTT6uWCTKYdyAWxkUXXqiG5SMralxSlX9Rbc+dDoJmGsBQ++Ej3TAZplu 3QBlF0jb9DCDQWPfoq/DgUusEp30JZ+zl5EnY8Es= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728700AbgHaPaj (ORCPT ); Mon, 31 Aug 2020 11:30:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:39708 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728612AbgHaPaY (ORCPT ); Mon, 31 Aug 2020 11:30:24 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B3A6A207EA; Mon, 31 Aug 2020 15:30:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598887823; bh=SjN8iminpZiXmeBHQ3gKw/eRxDZLxp1Xr4nXn7Ml+q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z0noHzwbiA1bMrbUdSrDR0sDcKVByvEvKcLdzopp3gg72X1YnFYRn1j/JtHfO5Jan 1RQ9ZJLmYUJOmGh9jSDUGBL8SziNlS5NCBqekoZLc9zSRm1ZZgdl2BorI7CO4XTRAW 4H1ER9uJkIb8Mn8eSgKeyMh6fn1R6JGtGydR/gYY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tong Zhang , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.8 33/42] drm/amd/display: should check error using DC_OK Date: Mon, 31 Aug 2020 11:29:25 -0400 Message-Id: <20200831152934.1023912-33-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200831152934.1023912-1-sashal@kernel.org> References: <20200831152934.1023912-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tong Zhang [ Upstream commit ed9ab229fea24cbcab17f484297dc8344afb7ea9 ] core_link_read_dpcd returns only DC_OK(1) and DC_ERROR_UNEXPECTED(-1), the caller should check error using DC_OK instead of checking against 0 Signed-off-by: Tong Zhang Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 91cd884d6f257..7728fd71d1f3a 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -4346,9 +4346,9 @@ bool dc_link_get_backlight_level_nits(struct dc_link *link, link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT)) return false; - if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK, + if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK, dpcd_backlight_get.raw, - sizeof(union dpcd_source_backlight_get))) + sizeof(union dpcd_source_backlight_get)) != DC_OK) return false; *backlight_millinits_avg = @@ -4387,9 +4387,9 @@ bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_milli link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT)) return false; - if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL, + if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL, (uint8_t *) backlight_millinits, - sizeof(uint32_t))) + sizeof(uint32_t)) != DC_OK) return false; return true; -- 2.25.1