From patchwork Fri Dec 8 10:20:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 751852 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b="DQtsWe5G" Received: from mail-wr1-x42d.google.com (mail-wr1-x42d.google.com [IPv6:2a00:1450:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D38A170F for ; Fri, 8 Dec 2023 02:20:26 -0800 (PST) Received: by mail-wr1-x42d.google.com with SMTP id ffacd0b85a97d-3332fc9b9b2so1759258f8f.1 for ; Fri, 08 Dec 2023 02:20:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1702030824; x=1702635624; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=LI2cPVtpfspTOTHLatTsMeq1yG49Tg1pPBonSn3WXmM=; b=DQtsWe5GEiwk/RGOgQYa3ghTQuUTZMxpZU4aeKBhZ6SbyDqyqHeuhICCiw4jh9zzuu Bss6YXFC0jeH8X8ubeH4y7FUlxgzaMIeV+kJBus3T1t9MUf3nwalqlb/n4eQArBFQC1u CT+dgvRUCo4AJj9btZNMTmBi99BXgtma7c6D/mQzDdR3H3H6H1fK16wmdhxVDK3mEmia PwbueeesmwpnQWmELFQm5sNL+Hp8VNYPPQ8lcyZ3vIA9k1CXuJSFQoIT03Goo2tfWe1j JIdFZ/xqf7Qgj1u/emIY9JOq9eJoox/nxQkJhLW5RmrvYVPyMk2SJu7l/fi4OFXzk9bN Mfaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702030824; x=1702635624; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=LI2cPVtpfspTOTHLatTsMeq1yG49Tg1pPBonSn3WXmM=; b=qXC1Np99Z5f4/4fYKKFc3KC6dCw4bKEQ7lyEMXmyky5OaA9clHWl49niMdYE0+Nhqi OblSEO8amE6FFoq5j3JjlA3mruP8qwApDB3pZdndD1+r5VjnmA+kokuXp86H8z5NP46F HSKlCRmoOBdBqhgeM2OBzrZruwsRCKYPXiVfapXM5p1i/KrRkN/bIa8N879o+7n7gDKR b4jycZWQJqasFHkJFvKnYtp//J7HOoKDXuT4qNVnULKLwEHpXN7G5Rune1/ewjiqwemc PP3OvzD2pW+lV1uppqTIiMKe3hlQbbFfQS8O50Vs58+ZRlkvdKDYr+V00nl+bySckn6O MIFQ== X-Gm-Message-State: AOJu0YwVtlsc0SAfaCcPBf7GYKHSmJB2KPbKYgB/elzdoS5LVouH0fAb +gRSxarMV2sHc5FMUGrKE1o99YQF7Dqi8cquYuU= X-Google-Smtp-Source: AGHT+IFbM56mrm6YbDUOYY9EVLDFpuMqLJIZtsfB6U2sCK+rI8mTcbMUA4dKKEC0PeuK17ZtFrhJMQ== X-Received: by 2002:a5d:4145:0:b0:334:bc62:4b32 with SMTP id c5-20020a5d4145000000b00334bc624b32mr608180wrq.224.1702030824459; Fri, 08 Dec 2023 02:20:24 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:b162:2510:4488:c0c3]) by smtp.gmail.com with ESMTPSA id n16-20020a5d4850000000b003334926fb81sm1678026wrs.90.2023.12.08.02.20.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Dec 2023 02:20:23 -0800 (PST) From: Bartosz Golaszewski To: Linus Walleij , Andy Shevchenko , Kent Gibson Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 0/2] gpiolib: protect the list of GPIO devices with a mutex Date: Fri, 8 Dec 2023 11:20:18 +0100 Message-Id: <20231208102020.36390-1-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski I figured that - since the descriptor locking is going to take some more time - we should at least start the conversion and protect the GPIO device list with a mutex. Patch 2/2 here is actually a v2 of the original submission. v1 -> v2: - add a patch renaming two functions - protect the list in gpio_device_find() too - coding style tweaks Bartosz Golaszewski (2): gpiolib: rename static functions that are called with the lock taken gpiolib: use a mutex to protect the list of GPIO devices drivers/gpio/gpiolib-sysfs.c | 26 +----- drivers/gpio/gpiolib-sysfs.h | 6 ++ drivers/gpio/gpiolib.c | 166 ++++++++++++++++++----------------- drivers/gpio/gpiolib.h | 1 - 4 files changed, 94 insertions(+), 105 deletions(-) Reviewed-by: Andy Shevchenko