From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 135901448DF; Mon, 14 Oct 2024 23:02:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728946925; cv=none; b=tcctjGw/Ze9Va8n6yzNt0/tngxC6yhUIkgEwtSsldcU0SNpKCqZOZt7msCPsh03x1w00Z/vGxBMo9yGiY6oGpwS1/40McIRj0k0v+UeElX9CPr7CNVcGVAFpcpZ84TizhH9v8EyJ7evFBQU5FrWlM7Nrjm8T3/TaQ9Yw/W9PPyE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728946925; c=relaxed/simple; bh=isxeY2F05qQsZ2WKXbGh/MaxpRRZpflVYsLI4JN7mzA=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=s9m9ve3iDSlVs2t/uRHC1cut5yvXMZO9qq4u7Rw8Kgrp7tA2tw9d5mkrcA6JpzUnnN+Kkn7df2uhIYPDpaXxKSIZqMaVNa08mx6cVCvxUg2KWbnzfjma9rafgiZaCsQ+NOkFXZlywAd/SV0c3daguWMaJqhjwYPM9CFBbFpxt5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=b4N/dLyk; arc=none smtp.client-ip=209.85.221.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="b4N/dLyk" Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-37d49a7207cso3042232f8f.0; Mon, 14 Oct 2024 16:02:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1728946922; x=1729551722; darn=vger.kernel.org; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=fIkS7pzP1CV8VNgOcTKZ+pJdHHTX/0kd0qi96EfGmwA=; b=b4N/dLyk4Pu54nZpS8+5FCEeXtWYA5XmucQvLXafmYnihamCgzXOI1FWfLMyq9K6au VgIwAXNw3NCXJVwi3GlJ4izxGLYqX10Dj9WJxk7heZspNpGJgT8+oEf2/KAYPdXpqueg AUvVZa5Hn0IKKwILsGPikB6vO4EtdlMHaLQ12PuOG9junGLE8oG/OZv0wCL7aGjRQHQs MKUUI4vs2MlvrSAHqvxIVsot7UL6wsor9O1vjCxhQ4LmxV3izUxVAu0bQG+Cytp1A8kB DqjSRXfBMX1hli3bJnHNxIqEL1PWfcYTQuU/F+CQUjEGgxFEpVbJ9ICxHvr2WXnlZ6xZ wmyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728946922; x=1729551722; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=fIkS7pzP1CV8VNgOcTKZ+pJdHHTX/0kd0qi96EfGmwA=; b=LuvAYlX1LHGWwWkKdP+DBsBSA7kDu+f3wCdmxTMwrYNS+lVY9MPDXdKWTYa4uOb/Rg CaDSbFjgErCKlko803T2FdLJViL2o01HlojPLBDZHQ3qy/fBuUXo+WommaNJ+lQcq6AD 4j2DZ+HoJVfI1pSXDhNAXOpleqCfAhQjdxs/aoOohKXjd1YBugu1DEYZ24GNBmwkqose fJtrq1wDhIywmODwCfLejuzjgOOZz28WqKXXMVUxs3m5I379J9VHNUelsyiFJlJ7nKWP G6I7pIqqn9SNCY35ZsQeFCQ0y5Ej7iKMiT+JdWo4N1EI89br1vp06/Ae4nl2UcLzDZ/1 CChw== X-Forwarded-Encrypted: i=1; AJvYcCXDLsv99vFSquiM400rRIRXRlZ7CXgXMQOZ7p8KJBTCCGKFIFtnSrdLC80ztqZdBwWivkNKeN359305ZOPazA==@vger.kernel.org X-Gm-Message-State: AOJu0Yxd3ZcqDMwwWPWS7yloVtlhiP1MWsQ7OyWIdSaPVrPfpb1lHhnn /yAS64VkaO1y4gtYE7LtBdHFjkiFjoxpoisxFLOyYMSFV4Y3WevCEh5qTg== X-Google-Smtp-Source: AGHT+IGtA4bl0vTDiM0+34/hmRCDBCj/NNYNNYyHfcFZcCHzGIIQMEEMETQwN5PfPgRBOylVg4J0pA== X-Received: by 2002:a5d:4d8c:0:b0:374:bd48:fae9 with SMTP id ffacd0b85a97d-37d5ff2a6fbmr7178985f8f.20.1728946922222; Mon, 14 Oct 2024 16:02:02 -0700 (PDT) Received: from [192.168.1.240] ([194.120.133.80]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-37d7fa87c7dsm105712f8f.42.2024.10.14.16.02.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Oct 2024 16:02:00 -0700 (PDT) Message-ID: <9c02683d-c688-4e39-913e-6b20b3bd76a0@gmail.com> Date: Tue, 15 Oct 2024 00:02:00 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Arend van Spriel , "linux-wireless@vger.kernel.org" , brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com Cc: "linux-kernel@vger.kernel.org" From: "Colin King (gmail)" Subject: incorrect shift and mask operation in drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, Static analysis on drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c has found an issue with a mask and shift operation in function wlc_phy_rxcal_radio_setup_nphy() as follows: lines 26326-26330: offtune_val = (pi->tx_rx_cal_radio_saveregs [2] & 0xF0) >> 8; offtune_val = (offtune_val <= 0x7) ? 0xF : 0; and similar in lines 26376-26381 too. The issue is that the expression pi->tx_rx_cal_radio_saveregs[2] & 0xF0 when shifted 8 places right is always zero, so this looks like a mistake since some value value between 0..0xf is expected in the second statement. Since pi->tx_rx_cal_radio_saveregs[2] is a u16 value the expression could plausible be: (pi->tx_rx_cal_radio_saveregs[2] & 0xf0) >> 4 or (pi->tx_rx_cal_radio_saveregs[2] & 0xf00) >> 8 I don't have knowledge of the hardware so I'm not sure what a suitable fix is. Regards, Colin