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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 E0627C33CB6 for ; Thu, 16 Jan 2020 18:11:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A91EF2176D for ; Thu, 16 Jan 2020 18:11:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579198278; bh=7aLUV/g52m7e9KvwN151imfLZFO56mEPatkTBzlxJew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ulW1WIoYL0HXvS9zSZygL2tjLKI8JD6T/FJfKB9R4siOwp4vvV4UQtlR5H8QOnf7x ZCbs50k9Vu0JF3PxEzA5voV9Zol5g9t+FHL5QCUQfk9Vd3R3e2DQNhPF+OuJyPLQLe M9n7JDmSXeT8VFZDVXCPRHQyX/JjgQS4qc92e3DY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405016AbgAPRhe (ORCPT ); Thu, 16 Jan 2020 12:37:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:52946 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405398AbgAPRhe (ORCPT ); Thu, 16 Jan 2020 12:37:34 -0500 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 65C47246C3; Thu, 16 Jan 2020 17:37:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579196253; bh=7aLUV/g52m7e9KvwN151imfLZFO56mEPatkTBzlxJew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NfhmHNut/gzpdegu5a68vX7jQrLqM6KJ2kfK0FKIha6WSlk4t2PeTvTjH5jd5nWfu qe2S4GI+so6pF2CQfTHr50Un3GWrqNtyOQcHXc22kS17E4XOxmrpqQJRijGhGCNOzM e5WphU2J3L67MW/zeiLkIlYa/Krk0tx3tQG36fp8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Colin Ian King , Ben Skeggs , Sasha Levin , dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.9 080/251] drm/nouveau/bios/ramcfg: fix missing parentheses when calculating RON Date: Thu, 16 Jan 2020 12:33:49 -0500 Message-Id: <20200116173641.22137-40-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116173641.22137-1-sashal@kernel.org> References: <20200116173641.22137-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Colin Ian King [ Upstream commit 13649101a25c53c87f4ab98a076dfe61f3636ab1 ] Currently, the expression for calculating RON is always going to result in zero no matter the value of ram->mr[1] because the ! operator has higher precedence than the shift >> operator. I believe the missing parentheses around the expression before appying the ! operator will result in the desired result. [ Note, not tested ] Detected by CoveritScan, CID#1324005 ("Operands don't affect result") Fixes: c25bf7b6155c ("drm/nouveau/bios/ramcfg: Separate out RON pull value") Signed-off-by: Colin Ian King Signed-off-by: Ben Skeggs Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr3.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr3.c index 60ece0a8a2e1..1d2d6bae73cd 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr3.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr3.c @@ -87,7 +87,7 @@ nvkm_gddr3_calc(struct nvkm_ram *ram) WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16; /* XXX: Get these values from the VBIOS instead */ DLL = !(ram->mr[1] & 0x1); - RON = !(ram->mr[1] & 0x300) >> 8; + RON = !((ram->mr[1] & 0x300) >> 8); break; default: return -ENOSYS; -- 2.20.1