From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (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 78A9A2BF002 for ; Fri, 10 Jul 2026 14:28:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783693728; cv=none; b=bqgPlozVre1EFlkQFTd1b4e+juZMM0PbkJe9OzHGNibEGXtd2+++05p3XH+lZuTMGIn+cjC/WvE4axG/X9jo4SPGMh1GYpt1AVS75/tScJ7zvW9KxWOdzH5ybMg1iCBP/k73jJ7mMen44z3RRUHFzSfka5x2NqXFTWXqzexgg0A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783693728; c=relaxed/simple; bh=YqsthvRuRGyFzu06YL4H2mAJvpJFPU65v/ndXdSDu1A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Mm439BvCQHtsqcKHHiPFhZnI85RE32Bkqgg/w0uemnF0zGaTVp6GM3vP5nOWexw5r9RIC/VfH6jN98YregPg70lbLZznZTBpr9245A5QSPYMekLypepXzC3D6ZC5yO1B+fYBVhh9jjZo+j4kR/1ul0ooTaMDEuMUAAJnXc6rzbA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VaNBzMYK; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="VaNBzMYK" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-84536ecfc5bso1048735b3a.2 for ; Fri, 10 Jul 2026 07:28:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1783693727; x=1784298527; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:sender:from:to:cc:subject:date:message-id:reply-to :content-type; bh=c1ksdIEPMKoxqR8mRgNtH7NsEhKoyOrJ954FAv5Yb8o=; b=VaNBzMYKrzfVIVbmxC2p7GpuX+zSiAg1xnO4IFankAwncAJ5FqdRAZplEBf01iCxPz PluvCUas0PLCUmAleNwb1mN6Pqe7anGhwq9meluLvJ9C9LWTUqRhSsZYWPbrnQeHDKHV dMfTWfn1OZpUlquEyGAZHzckDbw/dA5YubPLmqE3LuLj5LoJgLBiNuGeyh1Hsqi7kBWR LjH6dItyA1m+tDOh1lMmYSIxScaBBGQtWtLhLQTMjRx56f0Nfmw7m61JQ0LzjC52YJQL FjwlEIbBs+yOs9EeNUL3c+sbfwBXLkWp2vfj+Xd5VT7Z9qWlIXUyQ1ingNZIc1EguGW8 05Sg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783693727; x=1784298527; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:sender:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=c1ksdIEPMKoxqR8mRgNtH7NsEhKoyOrJ954FAv5Yb8o=; b=A8fhVuLqLEtKimztagfcVZvTabE9S+oP7CswwXkNy8CeoHLR6mseogLpmgKperzTrK m+ddjlPkqJ1QnjZR/TmXw9dhEd+GnDtj7ULCoIbn3sdSGJ8vyKByaoyluyqRt/QQkhgi AX76YKhJPV++/jAis0I1V0qKOdixhQjHQHsZir65t/I6BMp8QP7JEehsu/QH8y2p8AX6 K7IHt7+5qKvTndrLHQP83zudTBNZMANyCI8ByZvQ0CLb0RusD4S3SaEfjDz+UAHJgwsO yl9THZ2mmT2J44fW+A4ZMRjQ/UGn+WXFMvReRPf1Si6IyOObCH9vscxUbtIU2mTVK/fg ZRUw== X-Forwarded-Encrypted: i=1; AHgh+Rr4AZWXl6TvpsSxVqAaAcfeS4vDJ8jKuOADV8gkVc7ymzQIYaXNfruGzJ29O+g/7gakpzOrZleeopYbbK8=@vger.kernel.org X-Gm-Message-State: AOJu0YwSeto0nbGus2dr7wxJWnSZBcJCKuqo8MgYCHTPugI6nzqidebX zLuXY+KKI8FGez++Oangt3atRYpZdOhbDRWMqd7lqXWvs4AZjkALRbex X-Gm-Gg: AfdE7ckQ+1Sgn8FvKAMvaDxBa+t/hzZHYfVjmpwBbT4FRFYs4vJ/SewCIqCKnj05bEG n/3iclKYy7HlU3VQrHHb/PbdF0iRUvaExEV9inVA3rzRxiZLDf9gm9jTUZkS7SiCON/H1taupAJ Zgb4sxK9TX/Kcaoe9WZt/mUgJAE7NaSFtE7ZjRijy1U1qCX6NTP46ciJy3UcNpi0TLjQJm+SV/8 qt1Q4b6Hk1gpXAfeen8Txh4BetlySdZZWs2NPOIt7mRIFJAeNmxHdNQaW2usfMK78VElhzhzpva Nqtc7FRRrM/FULv29XkmBjM8pvDYSHT/n04c5I9J1x6keurj0cQcJ7L0E1ABVlocedQ5ggeY0NR RXMTnBsQ5kIFZOFcwL6CICUadn0xt5+f3dPFwtGADjJ/60eSCxNY7XdTaF59OFsYV1TWrahgapD u5x6SFKwUXHVqxLD9ry6ychQCjp3Ul7XP+QeY3KYIyvQ0pU1thxNG/MioPCMsDFg== X-Received: by 2002:a05:6a00:18a6:b0:848:2f84:f42d with SMTP id d2e1a72fcca58-84843295dbfmr11552748b3a.70.1783693726717; Fri, 10 Jul 2026 07:28:46 -0700 (PDT) Received: from ?IPV6:2600:1700:e321:62f0:da43:aeff:fecc:bfd5? ([2600:1700:e321:62f0:da43:aeff:fecc:bfd5]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-847f6db0eaasm10350096b3a.52.2026.07.10.07.28.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Jul 2026 07:28:46 -0700 (PDT) Sender: Guenter Roeck Message-ID: Date: Fri, 10 Jul 2026 07:28:45 -0700 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 v4 7/8] hwmon: Add mutex protecting for sbtsi read/write through hwmon To: Akshay Gupta , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org Cc: corbet@lwn.net, skhan@linuxfoundation.org, arnd@arndb.de, gregkh@linuxfoundation.org, NaveenKrishna.Chatradhi@amd.com, Anand.Umarji@amd.com, Prathima.Lk@amd.com References: <20260710111642.850022-1-Akshay.Gupta@amd.com> <20260710111642.850022-8-Akshay.Gupta@amd.com> Content-Language: en-US From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; keydata= xsFNBE6H1WcBEACu6jIcw5kZ5dGeJ7E7B2uweQR/4FGxH10/H1O1+ApmcQ9i87XdZQiB9cpN RYHA7RCEK2dh6dDccykQk3bC90xXMPg+O3R+C/SkwcnUak1UZaeK/SwQbq/t0tkMzYDRxfJ7 nyFiKxUehbNF3r9qlJgPqONwX5vJy4/GvDHdddSCxV41P/ejsZ8PykxyJs98UWhF54tGRWFl 7i1xvaDB9lN5WTLRKSO7wICuLiSz5WZHXMkyF4d+/O5ll7yz/o/JxK5vO/sduYDIlFTvBZDh gzaEtNf5tQjsjG4io8E0Yq0ViobLkS2RTNZT8ICq/Jmvl0SpbHRvYwa2DhNsK0YjHFQBB0FX IdhdUEzNefcNcYvqigJpdICoP2e4yJSyflHFO4dr0OrdnGLe1Zi/8Xo/2+M1dSSEt196rXaC kwu2KgIgmkRBb3cp2vIBBIIowU8W3qC1+w+RdMUrZxKGWJ3juwcgveJlzMpMZNyM1jobSXZ0 VHGMNJ3MwXlrEFPXaYJgibcg6brM6wGfX/LBvc/haWw4yO24lT5eitm4UBdIy9pKkKmHHh7s jfZJkB5fWKVdoCv/omy6UyH6ykLOPFugl+hVL2Prf8xrXuZe1CMS7ID9Lc8FaL1ROIN/W8Vk BIsJMaWOhks//7d92Uf3EArDlDShwR2+D+AMon8NULuLBHiEUQARAQABzTJHdWVudGVyIFJv ZWNrIChMaW51eCBhY2NvdW50KSA8bGludXhAcm9lY2stdXMubmV0PsLBgQQTAQIAKwIbAwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4ACGQEFAmgrMyQFCSbODQkACgkQyx8mb86fmYGcWRAA oRwrk7V8fULqnGGpBIjp7pvR187Yzx+lhMGUHuM5H56TFEqeVwCMLWB2x1YRolYbY4MEFlQg VUFcfeW0OknSr1s6wtrtQm0gdkolM8OcCL9ptTHOg1mmXa4YpW8QJiL0AVtbpE9BroeWGl9v 2TGILPm9mVp+GmMQgkNeCS7Jonq5f5pDUGumAMguWzMFEg+Imt9wr2YA7aGen7KPSqJeQPpj onPKhu7O/KJKkuC50ylxizHzmGx+IUSmOZxN950pZUFvVZH9CwhAAl+NYUtcF5ry/uSYG2U7 DCvpzqOryJRemKN63qt1bjF6cltsXwxjKOw6CvdjJYA3n6xCWLuJ6yk6CAy1Ukh545NhgBAs rGGVkl6TUBi0ixL3EF3RWLa9IMDcHN32r7OBhw6vbul8HqyTFZWY2ksTvlTl+qG3zV6AJuzT WdXmbcKN+TdhO5XlxVlbZoCm7ViBj1+PvIFQZCnLAhqSd/DJlhaq8fFXx1dCUPgQDcD+wo65 qulV/NijfU8bzFfEPgYP/3LP+BSAyFs33y/mdP8kbMxSCjnLEhimQMrSSo/To1Gxp5C97fw5 3m1CaMILGKCmfI1B8iA8zd8ib7t1Rg0qCwcAnvsM36SkrID32GfFbv873bNskJCHAISK3Xkz qo7IYZmjk/IJGbsiGzxUhvicwkgKE9r7a1rOwU0ETofVZwEQALlLbQeBDTDbwQYrj0gbx3bq 7kpKABxN2MqeuqGr02DpS9883d/t7ontxasXoEz2GTioevvRmllJlPQERVxM8gQoNg22twF7 pB/zsrIjxkE9heE4wYfN1AyzT+AxgYN6f8hVQ7Nrc9XgZZe+8IkuW/Nf64KzNJXnSH4u6nJM J2+Dt274YoFcXR1nG76Q259mKwzbCukKbd6piL+VsT/qBrLhZe9Ivbjq5WMdkQKnP7gYKCAi pNVJC4enWfivZsYupMd9qn7Uv/oCZDYoBTdMSBUblaLMwlcjnPpOYK5rfHvC4opxl+P/Vzyz 6WC2TLkPtKvYvXmdsI6rnEI4Uucg0Au/Ulg7aqqKhzGPIbVaL+U0Wk82nz6hz+WP2ggTrY1w ZlPlRt8WM9w6WfLf2j+PuGklj37m+KvaOEfLsF1v464dSpy1tQVHhhp8LFTxh/6RWkRIR2uF I4v3Xu/k5D0LhaZHpQ4C+xKsQxpTGuYh2tnRaRL14YMW1dlI3HfeB2gj7Yc8XdHh9vkpPyuT nY/ZsFbnvBtiw7GchKKri2gDhRb2QNNDyBnQn5mRFw7CyuFclAksOdV/sdpQnYlYcRQWOUGY HhQ5eqTRZjm9z+qQe/T0HQpmiPTqQcIaG/edgKVTUjITfA7AJMKLQHgp04Vylb+G6jocnQQX JqvvP09whbqrABEBAAHCwWUEGAECAA8CGwwFAmgrMyQFCSbODQkACgkQyx8mb86fmYHlgg/9 H5JeDmB4jsreE9Bn621wZk7NMzxy9STxiVKSh8Mq4pb+IDu1RU2iLyetCY1TiJlcxnE362kj njrfAdqyPteHM+LU59NtEbGwrfcXdQoh4XdMuPA5ADetPLma3YiRa3VsVkLwpnR7ilgwQw6u dycEaOxQ7LUXCs0JaGVVP25Z2hMkHBwx6BlW6EZLNgzGI2rswSZ7SKcsBd1IRHVf0miwIFYy j/UEfAFNW+tbtKPNn3xZTLs3quQN7GdYLh+J0XxITpBZaFOpwEKV+VS36pSLnNl0T5wm0E/y scPJ0OVY7ly5Vm1nnoH4licaU5Y1nSkFR/j2douI5P7Cj687WuNMC6CcFd6j72kRfxklOqXw zvy+2NEcXyziiLXp84130yxAKXfluax9sZhhrhKT6VrD45S6N3HxJpXQ/RY/EX35neH2/F7B RgSloce2+zWfpELyS1qRkCUTt1tlGV2p+y2BPfXzrHn2vxvbhEn1QpQ6t+85FKN8YEhJEygJ F0WaMvQMNrk9UAUziVcUkLU52NS9SXqpVg8vgrO0JKx97IXFPcNh0DWsSj/0Y8HO/RDkGXYn FDMj7fZSPKyPQPmEHg+W/KzxSSfdgWIHF2QaQ0b2q1wOSec4Rti52ohmNSY+KNIW/zODhugJ np3900V20aS7eD9K8GTU0TGC1pyz6IVJwIE= In-Reply-To: <20260710111642.850022-8-Akshay.Gupta@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/10/26 04:16, Akshay Gupta wrote: > From: Prathima > > Add a mutex and take it around SBTSI read/write paths so that only > one transaction runs at a time. The lock is held only for the > duration of the bus transfer and associated driver bookkeeping, not > across blocking work unrelated to SBTSI. > > This is a concurrency hardening fix. > > Reviewed-by: Akshay Gupta > Signed-off-by: Prathima Acked-by: Guenter Roeck