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 590185AA687 for ; Fri, 16 Oct 2026 18:00:43 +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=1792173644; cv=none; b=FcVTdQdWwBbYCJuQGI1gjgi3IGKm7edl4uxHmyGwJ4WZQ5e3wY9KM/AAVRjtOdFOdc8jN8XblPHmAUoX1snkj49dRYL1ET5ssWvl0RAWoUu1eUiLeaIgLY1RBMcTC4LrUrCQyaOGQZa/YHQ/QgesZL4ddmZJIcrWxFSX/PEOA3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792173644; c=relaxed/simple; bh=dYFeupRHc6oAp60ttnCYyTs5k36ZN3vMESWL/sNF9fQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ZRq+GJ87x5zMx+86Q3/9SZiLPBeZKLTEX+NZX1QWU0NqJo7CcHp8Zz7+/+uWWqzxhOz59fcQqiQ3uCBmHrq51pEAAUWBmKLmvCyP+0Nr+OI0vZUn4Jw+A0JPpQ8JDF+f6pN5ce9E64Z0sG6w7XQMoAdc1R07Ljr5k53/s6jdvRs= 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=IxdfpYMV; 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="IxdfpYMV" Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id DAA96240105 for ; Fri, 16 Oct 2026 20:00:30 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=1984.8680eb; t=1792173630; bh=11iMMZTrj20U+SrYN+njM4FRnL4bVsSJ+M4i4qpVEik=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=IxdfpYMVc1AYBzfeIguNW+OBCUja9b4B52fqHPnegJbtQ5oh3pvGZ9hAt1cLQSuM7 4Pny32qKPNKnTONKaq38aTCzqWSthkFpWJW1Awk8zzXl7HQDBA/Y5eSMR5F0U8Emjv b5eKgvH/tLu7X3RGzdzF4LMWZ6gIqwIlAuAS0vYVMPcwmIQCzi9Y+eVaXmLIJMo5Oa h4LOhThTWcniby9eNOd68fkgwi74Kgo8IUy7VX9zPcUSosggrD4bWN0m3vJFBXTiVV 9XQJKexc0aJjLQvMOoXF2ppuE/sqN5hF0NRELvNhluAnOyuXZIqeDn5YLNDOBLywTK a+aG4gOjaaGEQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4j5t5P2TDSz9rxL; Fri, 16 Oct 2026 20:00:25 +0200 (CEST) From: Markus Probst Subject: [PATCH v4 0/4] rust: serdev: Refactor Date: Fri, 16 Oct 2026 18:00:29 +0000 Message-Id: <20261016-rust_serdev_probe_refactor-v4-0-46832e034757@posteo.de> Precedence: bulk X-Mailing-List: linux-serial@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/33OTW7DIBAF4KtYrEs0/DdZ9R5RZBmYNFRKcAGjV pHvXuJkYXXh5dPMfPPuJGMKmMmhu5OENeQQby3It464y3D7RBp8y4QD17AHRdOUS9+OPNZ+TNF in/A8uBITBeQWpBRKDoY0YGyT8LPgx9Mz58l+oSsP8bWR8HtqX8tzjdghI3Xxeg3l0FWzEzQ5Q x7Xl5Dbk9+laWXL8quU3ipVGQWq984PCGAkuo8x5oJx53FhK19RHDYp3igp7LtSTPOz8v8psaL ENiUa5ZnVaAwTCmFNzfP8B6qr2fKYAQAA 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. Howlett" , Uladzislau Rezki , Jiri Slaby , "Rafael J. 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=1705; i=markus.probst@posteo.de; h=from:subject:message-id; bh=dYFeupRHc6oAp60ttnCYyTs5k36ZN3vMESWL/sNF9fQ=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBq0mY4KL7qcuPRQxFfHwouuzo5slwJhbPsGOlh0 iyHEecxQSKJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCatJmOBsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9KBhBAAtqxpo51+XTizx5tw7XAyhjnV+8yhLO/ +Zqe5J6SVlGq4/Ig45IJbKwAXDYhzli2Q4mp8hSVMSjVGPYclz8z6PA6+xoRsACFlCPe1wPeS2R UXH0a7CG0+SpGr+68050mkyBZ+kB290DVlzNFs53jif9sTcsP33DDuTvLojhWyzmsZA8qY+A5QO e/cwm4fxhJRB/dSvmFlqKyL9oJPHPCh9EJkF8skDwIOOU/S1uNWFDs/HvM0f004b/TJjDBtZJkP xNZgFtPMPDDLxW3HfJaUENchRwtLssT4HorFQ8CrpG85/rxydj8VgbQOakbolekH/ycddZmYBzl dkat37bcN2h6fdMvXa8Y8Xgy0sSXfpoECoaKKwxWIbi2VypsHmgKTSDm5AQJzvc5w6iUYXR0vpV rt0CH0xg0hZ9eEo23OnwUF4yu2gGSyHZAsrcBqNt0QNFFejXVwo13ZLjapR58SlARy1wiwo8lPK ml3CwhOlTuY4/z4j5FqpUQP/YuQ/AIRTm76P0n6huPC1cTm8B2y2QRqok8k6TJW42Ai3GSukAHf Fv7koOPWK9B4YQ5IB0P7cN5GIlMr/KLo3fE/4AlMSwOMtzINLwCgQnLYGf/QhHyZD7WTANClLdH HwnWLux3Qa6D5hcdZ5XvgvEPJwSchPuGsqfboc3NUMQTQOmDox34= 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 v4: - fix issues reported by Sashiko: - add receive_lock to prevent deadlocks - Link to v3: https://patch.msgid.link/20260930-rust_serdev_probe_refactor-v3-0-d1b6e77135e0@posteo.de 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 | 84 ++++++++++++++++-- include/linux/serdev.h | 8 +- rust/kernel/serdev.rs | 167 ++++++++++++------------------------ 4 files changed, 188 insertions(+), 125 deletions(-) --- base-commit: ec8bf8280261294a9b9b4520414b42704c7f9f6b change-id: 20260905-rust_serdev_probe_refactor-0e2b044354a7