From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (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 AE0CC521203 for ; Wed, 30 Sep 2026 17:32:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.66 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789551; cv=none; b=Dd4F5DvTWF29fI1CBaUVd/zHm6Oj7oX2l7B/k93J+Lc+NumboBv464fn0/oUVTgcS48O+sRE0Hhfd6d84p+ISPshp6lu2bjcibcNKCU07ABCsWMt5+0xdQl0ELloP0DEXS6BCbKDbqS21Q57RMO1kP1uuM1gjUUSQndW4WWjWKA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789551; c=relaxed/simple; bh=ocxkrVXBALWT/Mvum2xc+qBbFN29pgyyDjWxXSVPDLE=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=V8ttnWh3FywtvzuT+vPRqfaEh8YVFPtUCB1KXTwgvhfIacvMAQwHsjNv5fEdFIU5SF6aD7qs/pdTSJsK3dZdG7hLnFxFMMT24QsY7HI9yOh4pskoquUuM5IGDUczgxKvUL2MQG5rLZf6VFVlkC/xQh+ydtyLjCzrlg1zbPryGO4= 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=csBAb2Z2; arc=none smtp.client-ip=185.67.36.66 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="csBAb2Z2" Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id CE8A9240106 for ; Wed, 30 Sep 2026 19:32:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=1984.8680eb; t=1790789546; bh=3005sGFVDNO/bvbLNOBBEpqWdrYQtVPFlOxulGAOHEQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=csBAb2Z29iNxLcJxNXeekOtcMS37I280b38JTzjHWCNaiduJfyy9siOVC0w5Zrp0Q mhVEgtGGcSIChbRrUs7/XnUb7eaw0KJwn9wwfVvw0exmBgHqrp5W2a6jtVZyeoCMQQ O6zkrgeoMNivVnvKvX4rELz9UvV9CuD5tODUpU1hnrQfuo2CiNalpPApAL//Tv73jA GMmmFeh6U0nN6189WTf9buu3aClPX5/YwTMF2+2C80Y7jpdxa6zXsTtsMrKR9kok44 unHfngMjRKkAs4o2aSZMlcfbP61VvGp0bCp62fw1o2uph6B4P71aQkAIq9c9MwP6CQ cGMRvDN3tE3sA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4hw2DQ12dLz9rxM; Wed, 30 Sep 2026 19:32:21 +0200 (CEST) From: Markus Probst Subject: [PATCH v3 0/4] rust: serdev: Refactor Date: Wed, 30 Sep 2026 17:32:25 +0000 Message-Id: <20260930-rust_serdev_probe_refactor-v3-0-d1b6e77135e0@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/32OTQ6CMBSEr0K6tuRRWlBX3sMY0p+n1kSLbWk0h LtbwIUrl5OZ+WZGEtBbDGRfjMRjssG6Rxb1piD6Kh8XpNZkTRiwBnYgqB9C7HLJYOp67xR2Hs9 SR+cpIFPAeS24bEkG9NmxrwV+PK06DOqGOs7Eb8Ljc8ircY0RJQNS7e53G/dFasuaei3I3L7ak Efey9NULeHvqebfqVRRoM1OG4kALUd96F2I6EqDCzaxHxSDvyiWUbxWWyGqhp2F+UVN0/QB/WT Uzk0BAAA= 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=1502; i=markus.probst@posteo.de; h=from:subject:message-id; bh=ocxkrVXBALWT/Mvum2xc+qBbFN29pgyyDjWxXSVPDLE=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBqvUelZ+KvdynNzUumA0rA3Q2C0KtOTMXd6hQLV n7aoBoVh5SJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCar1HpRsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9JxqQ/+I1uK7ZVlFfc8QShrpchTKSwadrPt0cn xXLqDhzxFT7nILlQWpvzCPJfGr1+IRACTC4BqpSuQ5+rRukK0fN87ib4qvfk47pKH6/63zXNWZP pdGf9xrjlHqMbk9zeLM/ubykphN+jVkEy8i2oFZHlzG4El3eUBCZUwH3xZ0CGzwGCwAIvzO4tQB BHt9NDlC3OWSYhSx2kFYH9tHxRiirNiIeq8oqpZuI9RVHl9syIhwRxAUGGOVtsdUn/X33Glk3KQ 1N7qv9J3oH7Mx7FVAyiQqzsF+gR6h/YMGnMWsRlyAtC84oFalA1mefd9DCRzRFctC1f7PsVgiBa w6K+SvEmpB5ncDsDr8zVakmqMkFrZzwWamPhEE0RGIcRLTx/2rO09NYwy4uYYBjx1HOpYbiXLr7 5Hmnwb2GzfllyagUK34kIe2q2jYuAZOttdMGo7Sf1dVNsTEv+vLftSjgrCwO6x4xQIDfoR0W5GE 6bQVjw3r8ZjBqvAZhF5Gj57vnaIYUmSKZoRrjyR7IlY6Thw+0T7/SKqFotygADsP6hgr7f8ii+O /3dUCIh1Yk1snn5g9ZIpsOq8qwFd/py/nYg1Pw6J/QqdNlgLc8hhym1iWnYBXNwqbylhb7Cnh+5 XNXPz2bHSQLBa1C86QKuDkYxylClaJAVEKzZ55s+g0sWm/sg0vR0= 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 mutex to C serdev tty port controller - 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 Signed-off-by: Markus Probst --- Changes in v3: - add mutex - Link to v2: https://patch.msgid.link/20260920-rust_serdev_probe_refactor-v2-0-43b855162f5d@posteo.de Changes in v2: - fix missing memory barriers in serdev apis - use `tty_buffer_restart_work` instead of `tty_flip_buffer_push` - use `tty_buffer_flush_work` instead of exclusively locking the mutex - add `#[inline]` to `PrivateData::driver_data` - remove patches for mutable references - Link to v1: https://patch.msgid.link/20260906-rust_serdev_probe_refactor-v1-0-69cdae0074ec@posteo.de --- Markus Probst (4): tty: serdev: Add mutex lock tty: serdev: Export functions to pause receive_buf callback calls rust: serdev: Replace `active` mutex with receive pause rust: serdev: Simplify callbacks drivers/tty/serdev/core.c | 54 +++++++++++- drivers/tty/serdev/serdev-ttyport.c | 68 +++++++++++++-- include/linux/serdev.h | 8 +- rust/kernel/serdev.rs | 167 ++++++++++++------------------------ 4 files changed, 173 insertions(+), 124 deletions(-) --- base-commit: 5a956dde5526a634dca7ccad27c051ebcc306089 change-id: 20260905-rust_serdev_probe_refactor-0e2b044354a7