From nobody Thu Dec 25 10:37:27 2025 Received: from exchange.fintech.ru (exchange.fintech.ru [195.54.195.159]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DC5C208B0 for ; Wed, 17 Jan 2024 14:44:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.54.195.159 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705502694; cv=none; b=CGuGoGZSzk078jYUn5uaNIYe3oQZ5EHwQTQRg91L/UAr7XPoebSAxLCJdEuX4s9deLAfzui+exJSVTolB7E4OyPXpnS+3tA87SuIh+BjqXlByOtKcfK3pPdC1/2z6nCzSZRfeu1qOxPePVHWqaroRSuwngS2pr6p5vsMlbVfmaU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705502694; c=relaxed/simple; bh=Q6lvD0eHMTY+UT6LhoSiXbVdelB/wpceNmG16NLyWkA=; h=Received:Received:From:To:CC:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=treWmRit0/ePnHyQfQYtcs/iuCEUnxDSX+2rvQPtC4Zj4VJlvf6WwUZxXu7EUNl/Ozw3/RwlPJIUSnhkV0umEg20KVcXP/d29zW+xucoDTaP6+7syKq5UZMUSDtWQzLmmTvegR/IwXtxQgA6E2Kec2y51/pLPW7mXaBLSLYM3lw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fintech.ru; spf=pass smtp.mailfrom=fintech.ru; arc=none smtp.client-ip=195.54.195.159 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fintech.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fintech.ru Received: from Ex16-01.fintech.ru (10.0.10.18) by exchange.fintech.ru (195.54.195.169) with Microsoft SMTP Server (TLS) id 14.3.498.0; Wed, 17 Jan 2024 17:44:39 +0300 Received: from localhost (10.0.253.138) by Ex16-01.fintech.ru (10.0.10.18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4; Wed, 17 Jan 2024 17:44:39 +0300 From: Nikita Zhandarovich To: Alex Deucher CC: Nikita Zhandarovich , =?UTF-8?q?Christian=20K=C3=B6nig?= , "Pan, Xinhui" , David Airlie , Daniel Vetter , , , , Subject: [PATCH] drm/radeon: remove dead code in ni_mc_load_microcode() Date: Wed, 17 Jan 2024 06:44:36 -0800 Message-ID: <20240117144436.10930-1-n.zhandarovich@fintech.ru> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: Ex16-02.fintech.ru (10.0.10.19) To Ex16-01.fintech.ru (10.0.10.18) Content-Type: text/plain; charset="utf-8" Inside the if block with (running =3D=3D 0), the checks for 'running' possibly being non-zero are redundant. Remove them altogether. This change is similar to the one authored by Heinrich Schuchardt in commit ddbbd3be9679 ("drm/radeon: remove dead code, si_mc_load_microcode (v2)") Found by Linux Verification Center (linuxtesting.org) with static analysis tool Svace. Fixes: 0af62b016804 ("drm/radeon/kms: add ucode loader for NI") Signed-off-by: Nikita Zhandarovich --- drivers/gpu/drm/radeon/ni.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c index 927e5f42e97d..8eac8c090433 100644 --- a/drivers/gpu/drm/radeon/ni.c +++ b/drivers/gpu/drm/radeon/ni.c @@ -624,7 +624,7 @@ static const u32 cayman_io_mc_regs[BTC_IO_MC_REGS_SIZE]= [2] =3D { int ni_mc_load_microcode(struct radeon_device *rdev) { const __be32 *fw_data; - u32 mem_type, running, blackout =3D 0; + u32 mem_type, running; u32 *io_mc_regs; int i, ucode_size, regs_size; =20 @@ -659,11 +659,6 @@ int ni_mc_load_microcode(struct radeon_device *rdev) running =3D RREG32(MC_SEQ_SUP_CNTL) & RUN_MASK; =20 if ((mem_type =3D=3D MC_SEQ_MISC0_GDDR5_VALUE) && (running =3D=3D 0)) { - if (running) { - blackout =3D RREG32(MC_SHARED_BLACKOUT_CNTL); - WREG32(MC_SHARED_BLACKOUT_CNTL, 1); - } - /* reset the engine and set to writable */ WREG32(MC_SEQ_SUP_CNTL, 0x00000008); WREG32(MC_SEQ_SUP_CNTL, 0x00000010); @@ -689,9 +684,6 @@ int ni_mc_load_microcode(struct radeon_device *rdev) break; udelay(1); } - - if (running) - WREG32(MC_SHARED_BLACKOUT_CNTL, blackout); } =20 return 0;