From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f52.google.com (mail-oa1-f52.google.com [209.85.160.52]) (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 E19EC30DEA6 for ; Mon, 16 Mar 2026 14:58:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773673132; cv=none; b=YH7eXK46umGO/k/W0J/4bS9KbXMtByBXK7XNeViV99CEmVGqUJN7JLX7yylWQBb3FkHAHiKw0BaKXdpUWemrOHmU2pGyzh9cytw/0zKCBDf4hy4vRjOmr+JBqzFLhtMpkEUzHSMFs7vKcqw+sPjrY75gf4ixn2C3A4yNsTQPjC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773673132; c=relaxed/simple; bh=J52sXQFy1d+pN+ZbLoCpmzMDgrEsc/3CaV7dc1H96XE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Uq/N7QZeHU9RjOQFuuccQNk4mlKj1gEaDmooOY4Ul750vHibTval6AEQaOfePtzuDj29TFg1mWiz13pLPX0XnLD3e3XEYji5gt0PO1tWbkKYUH+8q2G6UY5uWSVvF38Gixu+wP3ztFq5hN4fPTzBwrod3bCe1cDTuyPfuFKLFiE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=g0X4Vq4H; arc=none smtp.client-ip=209.85.160.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="g0X4Vq4H" Received: by mail-oa1-f52.google.com with SMTP id 586e51a60fabf-417c34b0509so2125279fac.1 for ; Mon, 16 Mar 2026 07:58:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1773673129; x=1774277929; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=L6W3ta1EmaKi/KvddroOldqnVJ7a0ddbxWZg37STItE=; b=g0X4Vq4HfQfcTUsBD5w7wjC6Maacj3kIix+UyiTsc1IS7zAg4CifEJeQz+9+z32TxW BjR68xhBSzA6cFnOsllxIH1xdBZUWCkaGFrbVCsKxcsM+ZHDt1gTOI7ystn1bDxSXM5X 2PZOo7zzLHs1zWGU3hl/NKWMTaLu09Ahp4vpjoCwlw3XEVtff+PjH7/u/ZDLl2PKe6gF P2l7SRTsQs4vGtwdUkmP/f+hRizE8JbRJX7kgbmtMqj0N1X2vnxMwcCba+4FMcOpOdpw cG7bOMgFTsWhANRLHtOoom9XYyMfGdhrQ4Ruio8Zj7BuSwqcnOt2hTFQivR1tlm/INqz kLhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773673129; x=1774277929; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=L6W3ta1EmaKi/KvddroOldqnVJ7a0ddbxWZg37STItE=; b=E3beNlzLTDtuc9Tv2uA0USqZ/CVJFE57zGkssk0loWeuvST/is5civQfqAu7ogDFeV Jhjwa8vOIHUpAoC4Rc8wdb7I7zoSSsxoEgS7ERSUwnKzZHVqT/v2CHjxsN15cNlCquFw xyzypgbrR8khcDwZbblE/OTAfszD1pB11H8eg+SpM1OVP0/z2/zhOOBS8PEceJohiNU7 7k2L9el6M1UwO6QZOCld8qxyO6j4EmnsZLAwpuJaYjYa+0Pvkkh+dq0e7lXAl9Lj6jtf cB/+V7b/9+OKC8Zt/m9ifPv6XYEucokmWzZRnFvmyguBN90+RJ2+6tJTGHm35IqHthKs vAXw== X-Forwarded-Encrypted: i=1; AJvYcCUTLd0uTytprfOtLk+0qIocal873L/GLyqkTFMYtscuB471iLMEDG0b1/Kixus9lQWgVFH00VdSu1d6Dv0=@vger.kernel.org X-Gm-Message-State: AOJu0YxmNoWkDZSTY/5B6zgk7YC5MyD3/+TjHr96Dbz91q3l9TiubxiX yr4ba/WzJw1UaA1Dmja01QDomIlx7snC9NdsqvVWUbfGl74iOceUbzWdXOFvuxQEwL4= X-Gm-Gg: ATEYQzwYLDaz46f9JZdFovVK7JhnRGG1EAWbdCL+7OUe3z1GjJ5cx/nh79nloPVOueC SLltULU52BtX3D/PSI0gq0v3cRp7XV5m/nitsBX+8Z3V0pqcDVZDy6mlxkIBAoKVdO6iBJm3D6L l61zQY+0i4VbRSg0URnISv36wnRo/UQZBCYXCzQ2yDgyv7e1j4JDpQQusnpUIeTaFrfoLDcirBp txLoWoAo7z43mNaZOPio41ZqfD0b+NKIVyxOrBGZxq3JWwAIHJvYkdruxMBbTqPm07K+HVWWXmQ nTesSg+nujwpJ64mN5z57qtSesYFQvcaXFu3D+KIDEYx3fUHAzru7nj3RFeDQwmU9XXkFcbDvdy FSc/aP6Ev6OxfgeWIbYof9aY7FvyuoiRpOZcPekwllaeqhkgtrsuezXcFmQXSPk865ZFNcQSkZD jZoC9JJ1TrX5+XRGaH39dC+/zGs3jgAo5n9mFFWAL17V8QF9zTadBRRvSapYTvmJLEpCLtXoEbw A== X-Received: by 2002:a05:6870:44d3:b0:417:3c76:6582 with SMTP id 586e51a60fabf-417b9174e0amr8669148fac.7.1773673128824; Mon, 16 Mar 2026 07:58:48 -0700 (PDT) Received: from ?IPV6:2600:8803:e7e4:500:e504:a034:1152:a664? ([2600:8803:e7e4:500:e504:a034:1152:a664]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4177e6ae0e3sm17421386fac.16.2026.03.16.07.58.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 16 Mar 2026 07:58:48 -0700 (PDT) Message-ID: Date: Mon, 16 Mar 2026 09:58:47 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] iio: adc: ti-ads7950: use iio_push_to_buffers_with_ts_unaligned() To: Andy Shevchenko Cc: Jonathan Cameron , =?UTF-8?Q?Nuno_S=C3=A1?= , Andy Shevchenko , Dmitry Torokhov , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260314-iio-adc-ti-ads7950-declare-dma-buffer-v2-1-2087fc18b077@baylibre.com> Content-Language: en-US From: David Lechner In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/16/26 6:26 AM, Andy Shevchenko wrote: > On Sat, Mar 14, 2026 at 04:12:24PM -0500, David Lechner wrote: >> Use iio_push_to_buffers_with_ts_unaligned() to avoid unaligned access >> when writing the timestamp in the rx_buf. >> >> The previous implementation would have been fine on architectures that >> support 4-byte alignment of 64-bit integers but could cause issues on >> architectures that require 8-byte alignment. > > ... > >> + u16 rx_buf[TI_ADS7950_MAX_CHAN + 2] __aligned(IIO_DMA_MINALIGN); >> u16 tx_buf[TI_ADS7950_MAX_CHAN + 2]; > > ... > >> - iio_push_to_buffers_with_timestamp(indio_dev, &st->rx_buf[2], >> - iio_get_time_ns(indio_dev)); >> + iio_push_to_buffers_with_ts_unaligned(indio_dev, &st->rx_buf[2], >> + sizeof(*st->rx_buf) * >> + TI_ADS7950_MAX_CHAN, > > Hmm... Wouldn't this benefit from array_size() macro? I don't think so. This is a compile-time constant. array_size() is a function that handles overflow, and there is no risk of overflow since it is a constant. > >> + iio_get_time_ns(indio_dev)); >