From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E503377ECA for ; Sun, 6 Sep 2026 15:55:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.65 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788710138; cv=none; b=ERpFlQrTZ29a3otbQoFadYEqlZQ5tJ+W5VofQR3Fuy49HnJAsL1F+zJnvvab1R8q2vkiFfOANtGoBCuZ5Bc0jbVDoKZHhb0ACPDdhEdZ7ZWtlM6HejXTIcVaeZJUAqSQchCuCsJt7ikeP/CnIU9yNHnrQQ5kso0hWjpPAQa3GvE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788710138; c=relaxed/simple; bh=IUT9wQKJhYMYNpvwzp523KgdDxKg/ILAJMoXUNXABsg=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=m1kXf2wDuC46zkMeAOZh8H2KYnKV4AvsBhu1V5vkHquR1z8ryRpDFgpUISyvvQwiMb4laZa0/ttaLYq5MhDZ3t8gRoxz3bVIvCXD33IB2Z8QVomJ5ff8ZsjTCj3KxZunTi3i2L+v65M7IAM+vm5ekg3FyObKtYlnJWMnjkE2u/Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de; spf=pass smtp.mailfrom=posteo.de; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b=k6hQj54U; arc=none smtp.client-ip=185.67.36.65 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=posteo.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b="k6hQj54U" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id DCF0424002A for ; Sun, 6 Sep 2026 17:55:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=1984.8680eb; t=1788710128; bh=jwpkQyFqnars/Ss4HKKXX19eAFdRFeFAU5evcC6HTRE=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=k6hQj54Uf7TKfLuZu1KE1gJYHZCSNjvCVS0pDi4Yf/WOHfm9D6gdOiL1+OV4XAPNP unQgNy5K30u7xHOhGyVVYHmu8cqKstsOnF+7Ub2buq7OXjLQDlAw/3yo31MM5qlhTV xUP+scp4aQjI/YE1fGVBd3wFDDJ5SbT38diQCNAEyUpSTA2Q2ZDg6C6sbH/dXSc3kY VpVYwY3aUbnzFyF7MXe+y79QPXoJPu9lkircVfa2Vz43TnosNEEeRqAtfuD+BHGAvg NmFpMIQb+9itOyvmGGXhsmhy9KC6LhhTn6HyXRvVHWywg5oAQV7WV7QFZbCeYtkdy2 ek1yMzp87zK8Q== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4hdFCb1PyYz6tsg; Sun, 6 Sep 2026 17:55:23 +0200 (CEST) From: Markus Probst Subject: [PATCH 0/5] rust: serdev: Refactor Date: Sun, 06 Sep 2026 15:55:25 +0000 Message-Id: <20260906-rust_serdev_probe_refactor-v1-0-69cdae0074ec@posteo.de> 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: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/y2NUQ6DIBBEr0L2uzSIWFOv0hgCuG1pouiCpInx7 qW1ny8z82aDiOQxQsc2IMw++jAVqE4M3NNMD+R+KAxSyIu4iobTGpMuowGznilY1IR341IgLlB aoVTdKNNCEcwl8e+f/NYfHFf7Qpe+xn+DcFnLazpqYE1E7sI4+tSx3J5rTq6Cft8/wRXhYaoAA AA= X-Change-ID: 20260905-rust_serdev_probe_refactor-0e2b044354a7 To: Ayush Singh , Johan Hovold , Alex Elder , Greg Kroah-Hartman , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Eric Biggers , Ard Biesheuvel , Lorenzo Stoakes , Vlastimil Babka , "Liam R. 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Wysocki" Cc: greybus-dev@lists.linaro.org, linux-serial@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, Markus Probst , Sashiko Bot X-Developer-Signature: v=1; a=openpgp-sha256; l=1376; i=markus.probst@posteo.de; h=from:subject:message-id; bh=IUT9wQKJhYMYNpvwzp523KgdDxKg/ILAJMoXUNXABsg=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBqnYzpM1kWcej/BXrRcE0gPTEJK6GoWxaNk0+O8 lFpr00wIqSJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCap2M6RsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9KQfQ//QwfYYqEIif7p6eWR56NPMqWqqCOFwqV ufBUpN4JAkpIsBkP9ux37sRPtHcUxm8vXfDxwMKJezn0o0Uc5PCWE1CkO8OoFTnO2mPMeoVxgxu xGu7Qt+h9hBk5jwMcsLvI9rcQJ46U4nZ6o1sQL+9BZmRqLJA6pWLrP8lHVza+TwqGpbVY3XRSrX 6t3ZvrYcNL6UUwmfa8Mcs7E7MG1MJ0HqaykPbUcpRAwK0UcfYDL5wBZNpqWvgDCDgXMitGke6gm cPfGOgeFC/B83PRTx+eGI4pvTKQn0jeoeKKCO3OL9ZEFa4f+wFqp0+aCup1akDcGfqjSqxbIApt ueNLOxcpjeRnX7VcsoewlPMFJgls2GDTOABKkKTPGYiyQemQJ5yDIdtykNZZDuAZl2vtYS6EGoq 4F10NdQH0A/3E2lKeUgyn4TQnNqTBNTjbFn07Fu52aprzKZfI4KlrHGmjzWrbYcVAY5xC3T/tov lvr4h/lMEwGQsC4nRRzxJYwfoe9zee3QZ3M7A2sD7/5XQAVdfRCEztSVfaFuk87rNTqXsRB2jzg AFVmKZeN1WC6j35kpnqrPsaz9cArKS+KJRZbsz7ug2RA4sdYryi/3sQfEyAqWCjCWzsNvl+1T5H x2/qET3mKDGpu2/chhxA9sTpS27og9XGl7NpINo0jLYLweKi7r7A= X-Developer-Key: i=markus.probst@posteo.de; a=openpgp; fpr=827418C4F4AC58E77230C47334761FF8E7AD43D2 Autocrypt: addr=markus.probst@posteo.de; prefer-encrypt=mutual; keydata=xsFNBGiDvXgBEADAXUceKafpl46S35UmDh2wRvvx+UfZbcTjeQOlSwKP7YVJ4JOZrVs93qReNLkO WguIqPBxR9blQ4nyYrqSCV+MMw/3ifyXIm6Pw2YRUDg+WTEOjTixRCoWDgUj1nOsvJ9tVAm76Ww+ /pAnepVRafMID0rqEfD9oGv1YrfpeFJhyE2zUw3SyyNLIKWD6QeLRhKQRbSnsXhGLFBXCqt9k5JA RhgQof9zvztcCVlT5KVvuyfC4H+HzeGmu9201BVyihJwKdcKPq+n/aY5FUVxNTgtI9f8wIbmfAja oT1pjXSp+dszakA98fhONM98pOq723o/1ZGMZukyXFfsDGtA3BB79HoopHKujLGWAGskzClwTjRQ xBqxh/U/lL1pc+0xPWikTNCmtziCOvv0KA0arDOMQlyFvImzX6oGVgE4ksKQYbMZ3Ikw6L1Rv1J+ FvN0aNwOKgL2ztBRYscUGcQvA0Zo1fGCAn/BLEJvQYShWKeKqjyncVGoXFsz2AcuFKe1pwETSsN6 OZncjy32e4ktgs07cWBfx0v62b8md36jau+B6RVnnodaA8++oXl3FRwiEW8XfXWIjy4umIv93tb8 8ekYsfOfWkTSewZYXGoqe4RtK80ulMHb/dh2FZQIFyRdN4HOmB4FYO5sEYFr9YjHLmDkrUgNodJC XCeMe4BO4iaxUQARAQABzRdtYXJrdXMucHJvYnN0QHBvc3Rlby5kZcLBkQQTAQgAOxYhBIJ0GMT0 rFjncjDEczR2H/jnrUPSBQJog714AhsDBQsJCAcCAiICBhUKCQgLAgQWAgMBAh4HAheAAAoJEDR2 H/jnrUPSgdkQAISaTk2D345ehXEkn5z2yUEjaVjHIE7ziqRaOgn/QanCgeTUinIv6L6QXUFvvIfH 1OLPwQ1hfvEg9NnNLyFezWSy6jvoVBTIPqicD/r3FkithnQ1IDkdSjrarPMxJkvuh3l7XZHo49GV HQ8i5zh5w4YISrcEtE99lJisvni2Jqx7we5tey9voQFDyM8jxlSWv3pmoUTCtBkX/eKHJXosgsuS B4TGDCVPOjla/emI5c9MhMG7O4WEEmoSdPbmraPw66YZD6uLyhV4DPHbiDWRzXWnClHSyjB9rky9 lausFxogvu4l9H+KDsXIadNDWdLdu1/enS/wDd9zh5S78rY2jeXaG4mnf4seEKamZ7KQ6FIHrcyP ezdDzssPQcTQcGRMQzCn6wP3tlGk7rsfmyHMlFqdRoNNv+ZER/OkmZFPW655zRfbMi0vtrqK2Awm 9ggobb1oktfd9PPNXMUY+DNVlgR2G7jLnenSoQausLUm0pHoNE8TWFv851Y6SOYnvn488sP1Tki5 F3rKwclawQFHUXTCQw+QSh9ay8xgnNZfH+u9NY7w3gPoeKBOAFcBc2BtzcgekeWS8qgEmm2/oNFV G0ivPQbRx8FjRKbuF7g3YhgNZZ0ac8FneuUtJ2PkSIFTZhaAiC0utvxk0ndmWFiW4acEkMZGrLaM L2zWNjrqwsD2zsFNBGiDvXgBEADCXQy1n7wjRxG12DOVADawjghKcG+5LtEf31WftHKLFbp/HArj BhkT6mj+CCI1ClqY+FYU5CK/s0ScMfLxRGLZ0Ktzawb78vOgBVFT3yB1yWBTewsAXdqNqRooaUNo 8cG/NNJLjhccH/7PO/FWX5qftOVUJ/AIsAhKQJ18Tc8Ik73v427EDxuKb9mTAnYQFA3Ev3hAiVbO 6Rv39amVOfJ8sqwiSUGidj2Fctg2aB5JbeMln0KCUbTD1LhEFepeKypfofAXQbGwaCjAhmkWy/q3 IT1mUrPxOngbxdRoOx1tGUC0HCMUW1sFaJgQPMmDcR0JGPOpgsKnitsSnN7ShcCr1buel7vLnUMD +TAZ5opdoF6HjAvAnBQaijtK6minkrM0seNXnCg0KkV8xhMNa6zCs1rq4GgjNLJue2EmuyHooHA4 7JMoLVHcxVeuNTp6K2+XRx0Pk4e2Lj8IVy9yEYyrywEOC5XRW37KJjsiOAsumi1rkvM7QREWgUDe Xs0+RpxI3QrrANh71fLMRo7LKRF3Gvw13NVCCC9ea20P4PwhgWKStkwO2NO+YJsAoS1QycMi/vKu 0EHhknYXamaSV50oZzHKmX56vEeJHTcngrM8R1SwJCYopCx9gkz90bTVYlitJa5hloWTYeMD7FNj Y6jfVSzgM/K4gMgUNDW/PPGeMwARAQABwsF2BBgBCAAgFiEEgnQYxPSsWOdyMMRzNHYf+OetQ9IF AmiDvXgCGwwACgkQNHYf+OetQ9LHDBAAhk+ab8+WrbS/b1/gYW3q1KDiXU719nCtfkUVXKidW5Ec Idlr5HGt8ilLoxSWT2Zi368iHCXS0WenGgPwlv8ifvB7TOZiiTDZROZkXjEBmU4nYjJ7GymawpWv oQwjMsPuq6ysbzWtOZ7eILx7cI0FjQeJ/Q2baRJub0uAZNwBOxCkAS6lpk5Fntd2u8CWmDQo4SYp xeuQ+pwkp0yEP30RhN2BO2DXiBEGSZSYh+ioGbCHQPIV3iVj0h6lcCPOqopZqyeCfigeacBI0nvN jHWz/spzF3+4OS+3RJvoHtAQmProxyGib8iVsTxgZO3UUi4TSODeEt0i0kHSPY4sCciOyXfAyYoD DFqhRjOEwBBxhr+scU4C1T2AflozvDwq3VSONjrKJUkhd8+WsdXxMdPFgBQuiKKwUy11mz6KQfcR wmDehF3UaUoxa+YIhWPbKmycxuX/D8SvnqavzAeAL1OcRbEI/HsoroVlEFbBRNBZLJUlnTPs8ZcU 4+8rq5YX1GUrJL3jf6SAfSgO7UdkEET3PdcKFYtS+ruV1Cp5V0q4kCfI5jk25iiz8grM2wOzVSsc l1mEkhiEPH87HP0whhb544iioSnumd3HJKL7dzhRegsMizatupp8D65A2JziW0WKopa1iw9fti3A aBeNN4ijKZchBXHPgVx+YtWRHfcm4l8= OpenPGP: url=https://posteo.de/keys/markus.probst@posteo.de.asc; preference=encrypt The following has been changed: - introduce a new C serdev API to fix race conditions and simplify rust code. Should also be useful on the C side. - fix race conditions - simplify rust code - add rust function to provide mutable references to driver's private data - provide mutable references in callbacks to avoid the need for a SpinLock in the greybus patch series [1] [1] https://lore.kernel.org/rust-for-linux/20260827-gb-uart-transport-v2-7-a03bb1f5fbd1@beagleboard.org/ Signed-off-by: Markus Probst --- Markus Probst (5): tty: serdev: Export functions to pause receive_buf callback calls rust: serdev: Replace `active` mutex with receive pause rust: serdev: Simplify callbacks rust: Add `Device::drvdata_borrow_mut` rust: serdev: Pause receive callback before calling unbind drivers/tty/serdev/core.c | 50 +++++++++- drivers/tty/serdev/serdev-ttyport.c | 32 ++++++ include/linux/serdev.h | 6 ++ rust/kernel/device.rs | 24 +++++ rust/kernel/serdev.rs | 189 +++++++++++++----------------------- samples/rust/rust_driver_serdev.rs | 2 +- 6 files changed, 180 insertions(+), 123 deletions(-) --- base-commit: e5e04726cdd043e309677071ab1b65a4b18f422b change-id: 20260905-rust_serdev_probe_refactor-0e2b044354a7