From nobody Mon Feb 9 21:21:07 2026 Received: from mail-qv1-f43.google.com (mail-qv1-f43.google.com [209.85.219.43]) (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 5BE1718F2D4 for ; Sat, 11 Jan 2025 09:55:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736589327; cv=none; b=E28nN0bm254x8G5GMLkmBAaqG1oOaRmZGrV4IYbTMWL84GVw1GVn05xwVFkkrKsgv0pE+cRw0eU8L4kgOiaMwZJ5NKRqCZIsTsYmuszyjVFM/fkQtT6KspYBEy4AMORu/vPu8kORYnWxBjThAE6wSxgEirqcrZUNM6wDbzaWpvY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736589327; c=relaxed/simple; bh=cJ3Ao2R6zgoGJgyibADb5EAE6IKBeo/pElOZjlQDp0Y=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZyTcsJPOeAv6lI6gDaDke+DMeD8fhlvdHt+8KqiaRNu3UbsR/rVxFmqHBq7xrCH8p1WqNKBZYQT2DEiTEc8rmNgcTsoa/swZSwS4pQRe2lFiITxjLl385gyVggbiqwWfu+fbq1h4jErNYrwVKdyPjHMPDKVik8PqJF62aPl2G7c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=OuMYyroZ; arc=none smtp.client-ip=209.85.219.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="OuMYyroZ" Received: by mail-qv1-f43.google.com with SMTP id 6a1803df08f44-6dcc42b5e30so32494286d6.1 for ; Sat, 11 Jan 2025 01:55:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1736589324; x=1737194124; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=52iWgPg8zx+q33hKer1CkCPQAZHddOV8vj+q0ZyeQAY=; b=OuMYyroZ54iH3H6THbYRxENeEoSEm6U9dF9xpWxmLlRUSPh2Ze2UF+ZOeCuX+s/OKM wnDnthyOIuTqks1c+0lB8q7kVXqGtBxV2xi8rJMwDWMTZd+T9KBlxHodSFZuIlK+g83u A1KZ1Mz1rf1NnH+dkinadBwAmyVmx7LRXFlbg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736589324; x=1737194124; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=52iWgPg8zx+q33hKer1CkCPQAZHddOV8vj+q0ZyeQAY=; b=bCD/j7de4FvC7ntWBn3oZB+0D0lPrhMJ1qmLc1/QJphv14rOpgU3jNhtDPkb60sTWH XsOUJDtiayaNQ0PQbWZ9NGj3UuK3Xh78LoScymck48PuaFum8tSEY71MnYKeOgmSrOe7 qkkUrAwy4MIwvMaMu20LamEa5rv2XbkAm3NdXiOD5Z1YhrwuJVO0eArXcpD6w5y0Zrw4 Anx/8+tWvJh3dUWipGitmOS/G1SWh8CYhOpo57H9fFXoepfBepwYqLX3jhLT/3ulqpTu XPbqwesPtrPpV3GYcEhZU6YFz/t0BDUkM0grWCNGpgtZ1ga4zxmcYBDRJmEOql0XQiZi 2mlQ== X-Forwarded-Encrypted: i=1; AJvYcCWe2q9B0nmQA9ext39rd7Mvmckh13gHx7ftv7v/CldcECs08kKZ4/pOfqrrNxygx6QJNEbCA8hb9FIbzTw=@vger.kernel.org X-Gm-Message-State: AOJu0YxXawuDMvI6dFVduBO9ZeyT1emHN6MHyaSZZDVC7xh2WbzTw1pX a12Xt+RbOWuY5SAsnqQMssr8J7T3F9VrIDaz5oYqP2Z4E/cG9xV7LqDq3Uth8Q== X-Gm-Gg: ASbGnctxLu8qIhT2rj53tGYkbe3E0YHiLP9Y0+85UuetAS91qOVFqQD30mYYWVyPnKh uzD+k1lqrL0iy+fVVYa73RMPzchvXhV1CkQkojQeLOAuL0QfoMJqqDO9H1X3AmN2gdMS4GIHBan eZ9iNLnjQjBFCgt+SLRcB6n/NwvmyqzQS9TreC+E5BdLTdeyt2icjMu0l6EEf4nAirWK8rhJa9U OhiKtAkZeDVh/vHlfnAFMFBmy5YGcacanv+v4tGRL/VhKc8eCX0IYPawiyvmgmMR1v7c++EoNCR Ff5CFpPfCKigL6gW4akZaj9Jw2jx0k5AlU0x X-Google-Smtp-Source: AGHT+IFqiGK2VIMRcFvBZ2YyjvHmdtNauhF62df7aKlMfYRbakz7XnEj9n0FSoSywyG9ImyL+3sm3w== X-Received: by 2002:a05:6214:2a8f:b0:6d8:8e16:7c29 with SMTP id 6a1803df08f44-6df9b2383f5mr216932866d6.14.1736589324231; Sat, 11 Jan 2025 01:55:24 -0800 (PST) Received: from denia.c.googlers.com (172.174.245.35.bc.googleusercontent.com. [35.245.174.172]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7bce327b8besm267096785a.59.2025.01.11.01.55.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Jan 2025 01:55:23 -0800 (PST) From: Ricardo Ribalda Date: Sat, 11 Jan 2025 09:55:14 +0000 Subject: [PATCH v6 1/6] media: dvb-frontends: tda10048: Make the range of z explicit. Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250111-fix-cocci-v6-1-1aa7842006cc@chromium.org> References: <20250111-fix-cocci-v6-0-1aa7842006cc@chromium.org> In-Reply-To: <20250111-fix-cocci-v6-0-1aa7842006cc@chromium.org> To: Mauro Carvalho Chehab , Stanimir Varbanov , Vikash Garodia , Bryan O'Donoghue , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Kosta Stefanov , Ricardo Ribalda X-Mailer: b4 0.13.0 The datasheet recommends 55MHz frequency sampling, with a max of 69 MHz. (Kudos to Kosta Stefanov for the calculations). Replace z with a 32 bit uint, and make the range of the variable explicit. Found by cocci: drivers/media/dvb-frontends/tda10048.c:345:1-7: WARNING: do_div() does a 64= -by-32 division, please consider using div64_u64 instead. Reviewed-by: Kosta Stefanov Signed-off-by: Ricardo Ribalda --- drivers/media/dvb-frontends/tda10048.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/media/dvb-frontends/tda10048.c b/drivers/media/dvb-fro= ntends/tda10048.c index 3e725cdcc66b..1f87eb0dcf2a 100644 --- a/drivers/media/dvb-frontends/tda10048.c +++ b/drivers/media/dvb-frontends/tda10048.c @@ -328,7 +328,8 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u= 32 sample_freq_hz, u32 bw) { struct tda10048_state *state =3D fe->demodulator_priv; - u64 t, z; + u64 t; + u32 z; =20 dprintk(1, "%s()\n", __func__); =20 @@ -341,6 +342,11 @@ static int tda10048_set_wref(struct dvb_frontend *fe, = u32 sample_freq_hz, /* t *=3D 2147483648 on 32bit platforms */ t *=3D (2048 * 1024); t *=3D 1024; + + /* + * Sample frequency is typically 55 MHz, with a theoretical maximum of + * 69 MHz. With a 32 bit z we have enough accuracy for up to 613 MHz. + */ z =3D 7 * sample_freq_hz; do_div(t, z); t +=3D 5; --=20 2.47.1.613.gc27f4b7a9f-goog