{"id":2197816,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2197816/?format=json","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/1.0/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260218150940.131354-2-eichest@gmail.com>","date":"2026-02-18T15:08:49","name":"[v1,1/2] i2c: imx: fix i2c issue when reading multiple messages","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"7ebb3b9a6fc2b3c2fa9d79ced47eaa2ccd42db73","submitter":{"id":70438,"url":"http://patchwork.ozlabs.org/api/1.0/people/70438/?format=json","name":"Stefan Eichenberger","email":"eichest@gmail.com"},"delegate":{"id":149066,"url":"http://patchwork.ozlabs.org/api/1.0/users/149066/?format=json","username":"cazzacarna","first_name":"Andi","last_name":"Shyti","email":"andi.shyti@kernel.org"},"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20260218150940.131354-2-eichest@gmail.com/mbox/","series":[{"id":492569,"url":"http://patchwork.ozlabs.org/api/1.0/series/492569/?format=json","date":"2026-02-18T15:08:48","name":"i2c: imx: fix i2c issues when reading messages","version":1,"mbox":"http://patchwork.ozlabs.org/series/492569/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2197816/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=bfWitjns;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=linux-i2c+bounces-16046-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"bfWitjns\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.221.45","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fGKgq1YP8z1xpl\n\tfor ; Thu, 19 Feb 2026 02:10:15 +1100 (AEDT)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id CAFBE3019F28\n\tfor ; Wed, 18 Feb 2026 15:09:56 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 2288533F394;\n\tWed, 18 Feb 2026 15:09:56 +0000 (UTC)","from mail-wr1-f45.google.com (mail-wr1-f45.google.com\n [209.85.221.45])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id A3B2C319610\n\tfor ; Wed, 18 Feb 2026 15:09:54 +0000 (UTC)","by mail-wr1-f45.google.com with SMTP id\n ffacd0b85a97d-435f177a8f7so5824842f8f.1\n for ; Wed, 18 Feb 2026 07:09:54 -0800 (PST)","from eichest-laptop.corp.toradex.com\n (248.201.173.83.static.wline.lns.sme.cust.swisscom.ch. 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This must only be done for\nthe last message. Otherwise, the driver will timeout.\n\nHere an example of such a sequence that fails with an error:\ni2ctransfer -y -a 0 w1@0x00 0x02 r1 w1@0x00 0x02 r1\nError: Sending messages failed: Connection timed out\n\nFixes: 5f5c2d4579ca (\"i2c: imx: prevent rescheduling in non dma mode\")\nCc: # v6.13+\nSigned-off-by: Stefan Eichenberger \n---\n drivers/i2c/busses/i2c-imx.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c\nindex 85f554044cf1e..56e2a14495a9a 100644\n--- a/drivers/i2c/busses/i2c-imx.c\n+++ b/drivers/i2c/busses/i2c-imx.c\n@@ -1522,7 +1522,7 @@ static int i2c_imx_read(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs,\n \t\tdev_err(&i2c_imx->adapter.dev, \"<%s> read timedout\\n\", __func__);\n \t\treturn -ETIMEDOUT;\n \t}\n-\tif (!i2c_imx->stopped)\n+\tif (i2c_imx->is_lastmsg && !i2c_imx->stopped)\n \t\treturn i2c_imx_bus_busy(i2c_imx, 0, false);\n \n \treturn 0;\n","prefixes":["v1","1/2"]}