From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (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 0A6F221883E for ; Tue, 2 Dec 2025 20:32:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764707567; cv=none; b=FHXOsvH3M6jw/6g56QvNOrm3stfmNU30Onw4QnHFQKeJ8J23tenPS7oHuC0kaO7sEJ6EaYmqPDnjt83a/YyvRoNKCX/Pl+FnN/eTq9PYCWUHlfnnIRVv043TcJxrmvcI+9Z3yS51rKnzq2Uj6+Bbh7B9tnCoHeoj6D/QSGx4tQI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764707567; c=relaxed/simple; bh=xu08GN+iaE1NR2CiJs7br+IQxgHuECSd8j1tKJjCegM=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ylv1MQvGwqhU2xeeXdYIB8WnM4OGHbsoJirZ2a3UVAOTG0ABCJGGNun2pbYPKHc5NqKjRdvg36JeorDpO/qNQJtrrs8rGRXdzPcNlpQTwf04QtQG4PBYTU3nERqD+9jHQVH9mSoqfcPVNwOSEszpEdjuQ1tUnQJrRxc/WJVbcfY= 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=SufxYRkA; arc=none smtp.client-ip=209.85.128.54 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="SufxYRkA" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-477563e28a3so1375545e9.1 for ; Tue, 02 Dec 2025 12:32:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1764707564; x=1765312364; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=PUBtZ8cLKM5d5hZ3mQmHNgCoY0mmWdEWs/wmEJwMqZY=; b=SufxYRkAmLlVxpv4POQc7Yy24G6Z7cfoCVr0wrOHbkr+bBCQKKb14vJ+ShUdzmTUGP 7x1Q1IsfS3BMIWAofuD5szDqePIqgjgQj/yvqMK1xaSKRivJVGm806VihXQgCpls2jms Shy/82wx/1djoMP6TeMC5ZkHfyV2vX+5ONUdV8Fsj3aOgSUqfmLZ48bbxVWdLIx5Om5m Czz2PWhUOlolnZ/Dz8Diq1gNegtynP3PZiQUJ0UD7ZRdjIeC9X6JH9RSx6MRrG9au4bW mRSQjZuBxZkjRmApbVpL/6gakTBfbtKtSlB6teBuO+8GAqFeYHO6oRuxpEXfWxz/yaUW /LJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764707564; x=1765312364; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=PUBtZ8cLKM5d5hZ3mQmHNgCoY0mmWdEWs/wmEJwMqZY=; b=NRETfbRNuT0yxQKEM5R142Xqw+ngDE1Rx1F7iC5PWel7h3C357/aWwau6JSvofTN6J o1sscjSPSnaaYbf8zImdDPGUzvOiPjECbshJEPM6C/CwwjwJfSBh8ho8+QcWY5Ctyw5+ t448YJLPIOIoH0mPux0gsG00z3Z6E/+JvsuqBIQzRx3zPmM7ZhKJ76M4yF9Y2OaTbueU JHnhaeYWP6Q7YVxPYlCQPwdywO4Cd3Fu21nK84u6qWelZdtwkd0xn2lfIs92cpcdBQRH WLxQNE6xV1Ow50hNExfoFQT/nY7mCrr7NyBooPfte+4UaQr4SyPhMCCC+j43UmqAoOWs uLaQ== X-Forwarded-Encrypted: i=1; AJvYcCURjNnNIVBoykoMM6G7T0Jc2/zNJHCt66/VkxuZ+e/PQlmKjD3T33+xyu3TbWjsu10lw8tAK5XrLym/Uro=@vger.kernel.org X-Gm-Message-State: AOJu0YxMEJSBtuq+v4l2TD9sN8bpTC9/U0t/C22/B7S9wYsolenQvB4N ZXVDhkuUxm1eWTdGodaKskMmZHhyBuIniJSen3gN3yCe7tTGXPSHqAFz X-Gm-Gg: ASbGnct6ecgNBVvUvIT6JUeop8rFzrRg++LrRfJOA/ri/AtFzbGYOWcjzf+UcQn+Twp bTE7eoFWMR9P6utaIcUHN3qaO5ltzTgxi2y5U+AOQrQOP4qNyQDjhk45YGXNWFXynf24J8Cvwb+ tjKCVZLQj/WR7HoNO1TcTJ2xH4rytASqpcSpHWml+wdAOO8Ssq6WnUIwQeBeWw+mF0zROgIhqSq PXZi+e+BcB15OP3rhmk+qH6W9/wk+3Sz1n24/zO8mtJk93YedK6zSUe3A4Xtc3hSlMeENPo/RUu ej8TQj/4W8kYOb1O31mEnMv7xJTCJd7tBbU6ba/zxSbP4kKnt0pV455weDdJV8EpDVh1ggxK/iq nLltZcDL5Dpbum4892ynw/sytYzli3SatRHWTV5Y3v0z7FMvT0+3qAgNE1icCRdKC96xfvRSBwH uh0H8gDT4RLxtCoGqOxrwyjSiKNnRdzW1rzk8RwJQfeZKEdRPH8X6c X-Google-Smtp-Source: AGHT+IFivlozvH6bBlGbstrebUkwLUxZxo6lElB4cxa3RUVfhbge2mArpvbfT4BqVBOBwBydEMFZ6w== X-Received: by 2002:a05:600c:c8f:b0:475:ddad:c3a9 with SMTP id 5b1f17b1804b1-47926fa069cmr46582875e9.13.1764707564292; Tue, 02 Dec 2025 12:32:44 -0800 (PST) Received: from pumpkin (82-69-66-36.dsl.in-addr.zen.co.uk. [82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4792a8ccbfesm6461965e9.13.2025.12.02.12.32.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Dec 2025 12:32:44 -0800 (PST) Date: Tue, 2 Dec 2025 20:32:39 +0000 From: David Laight To: Thorsten Blum Cc: Helge Deller , Chelsy Ratnawat , Thomas Zimmermann , Andy Shevchenko , Raag Jadav , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] fbdev/pxafb: Fix multiple clamped values in pxafb_adjust_timing Message-ID: <20251202203239.63084e0f@pumpkin> In-Reply-To: References: <20251202181600.511166-2-thorsten.blum@linux.dev> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) 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=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 2 Dec 2025 19:36:17 +0100 Thorsten Blum wrote: > On 2. Dec 2025, at 19:28, Helge Deller wrote: > > On 12/2/25 19:15, Thorsten Blum wrote: > >> The variables were never clamped because the return value of clamp_val() > >> was not used. Fix this by assigning the clamped values, and use clamp() > >> instead of clamp_val(). > >> Cc: stable@vger.kernel.org > >> Fixes: 3f16ff608a75 ("[ARM] pxafb: cleanup of the timing checking code") > >> Signed-off-by: Thorsten Blum > >> --- > >> drivers/video/fbdev/pxafb.c | 12 ++++++------ > >> 1 file changed, 6 insertions(+), 6 deletions(-) > > > > Thanks for the patch! > > It looks good, so I'll include it in the fbdev tree. > > Out of curiosity: > > How did you notice? Do you actually have the hardware and tested it? > > I only compile-tested it. > > I stumbled upon another driver with the same bug and then used grep to > search for other instances and found about 6 or 7, including this one. I've just hacked minmax.h so clamp() and clamp_t() (and thus clamp_val()) are 'static inline u64 __must_check clamp(...)'. Didn't find any in any other files. But I think you missed some double error in the same file (nearby). David > > Thanks, > Thorsten > >