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GET /api/1.1/patches/2229505/?format=api
{ "id": 2229505, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2229505/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260428102503.1641162-1-ashish.a6@samsung.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260428102503.1641162-1-ashish.a6@samsung.com>", "date": "2026-04-28T10:25:03", "name": "hw/i3c/dw-i3c: Fix incorrect BCR/DCR extraction during ENTDAA", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "8cc4838b9f75c949aa9644472d2f45f070ee1a83", "submitter": { "id": 92321, "url": "http://patchwork.ozlabs.org/api/1.1/people/92321/?format=api", "name": "Ashish Anand", "email": "ashish.a6@samsung.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260428102503.1641162-1-ashish.a6@samsung.com/mbox/", "series": [ { "id": 501820, "url": "http://patchwork.ozlabs.org/api/1.1/series/501820/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501820", "date": "2026-04-28T10:25:03", "name": "hw/i3c/dw-i3c: Fix incorrect BCR/DCR extraction during ENTDAA", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501820/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2229505/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2229505/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=samsung.com header.i=@samsung.com header.a=rsa-sha256\n header.s=mail20170921 header.b=sKyFRG2T;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4cBf0xn9z1xvV\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 28 Apr 2026 20:30:02 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wHfhG-0000lz-5K; Tue, 28 Apr 2026 06:29:42 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <ashish.a6@samsung.com>)\n id 1wHfh9-0000kd-Gf\n for qemu-devel@nongnu.org; Tue, 28 Apr 2026 06:29:36 -0400", "from mailout4.samsung.com ([203.254.224.34])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <ashish.a6@samsung.com>)\n id 1wHfh5-00051r-1U\n for qemu-devel@nongnu.org; Tue, 28 Apr 2026 06:29:35 -0400", "from epcas5p3.samsung.com (unknown [182.195.41.41])\n by mailout4.samsung.com (KnoxPortal) with ESMTP id\n 20260428102919epoutp0487a7d53a093d40943995a2c5938e4c75~qfo-zrweB2250722507epoutp04J\n for <qemu-devel@nongnu.org>; Tue, 28 Apr 2026 10:29:19 +0000 (GMT)", "from epsnrtp02.localdomain (unknown [182.195.42.154]) by\n epcas5p4.samsung.com (KnoxPortal) with ESMTPS id\n 20260428102916epcas5p4f00f3709e58fc8763ce15a4f9f455691~qfo8htgYZ3028230282epcas5p4e;\n Tue, 28 Apr 2026 10:29:16 +0000 (GMT)", "from epcas5p4.samsung.com (unknown [182.195.38.89]) by\n epsnrtp02.localdomain (Postfix) with ESMTP id 4g4c9f6m4Zz2SSKj; Tue, 28 Apr\n 2026 10:29:10 +0000 (GMT)", "from epsmtip1.samsung.com (unknown [182.195.34.30]) by\n epcas5p3.samsung.com (KnoxPortal) with ESMTPA id\n 20260428102910epcas5p3980610701ef7374b681f74d75bc34f29~qfo3RN7cv0326803268epcas5p3c;\n Tue, 28 Apr 2026 10:29:10 +0000 (GMT)", "from test-System-Product-Name.samsungds.net (unknown\n [107.99.41.85]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id\n 20260428102904epsmtip19017acd25f694c37cdc49e2d40f66647~qfox8gvke3268832688epsmtip1a;\n Tue, 28 Apr 2026 10:29:04 +0000 (GMT)" ], "DKIM-Filter": "OpenDKIM Filter v2.11.0 mailout4.samsung.com\n 20260428102919epoutp0487a7d53a093d40943995a2c5938e4c75~qfo-zrweB2250722507epoutp04J", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com;\n s=mail20170921; t=1777372159;\n bh=huQEJryrU0XmT5jl2BmzMNK7M+oZGFikG3TqCT2zfyA=;\n h=From:To:Cc:Subject:Date:References:From;\n b=sKyFRG2T9qhBU+qwbug6YVcgXMUxQSFgk+iwXrKmPzPYrGYtTUXOOGVDdAOnMqv3K\n XowLIHsu8ba4f83hOayZg4tySv8WY43je7T8tXEpC36julTy7mtGeq1xLSgQ2mgTN8\n bLAsnQVP4UQnUaHkjp248fAl+GVe8OXwan6X0e5M=", "From": "Ashish Anand <ashish.a6@samsung.com>", "To": "qemu-devel@nongnu.org", "Cc": "komlodi@google.com, clg@kaod.org, jamin_lin@aspeedtech.com,\n nabihestefan@google.com, saurabh@samsung.com, vishwa.mg@samsung.com,\n y.kaushal@samsung.com, ashish.anand202@gmail.com, Ashish Anand\n <ashish.a6@samsung.com>", "Subject": "[PATCH] hw/i3c/dw-i3c: Fix incorrect BCR/DCR extraction during ENTDAA", "Date": "Tue, 28 Apr 2026 15:55:03 +0530", "Message-ID": "<20260428102503.1641162-1-ashish.a6@samsung.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CMS-MailID": "20260428102910epcas5p3980610701ef7374b681f74d75bc34f29", "X-Msg-Generator": "CA", "Content-Type": "text/plain; charset=\"utf-8\"", "CMS-TYPE": "105P", "cpgsPolicy": "CPGSC10-542,Y", "X-CFilter-Loop": "Reflected", "X-CMS-RootMailID": "20260428102910epcas5p3980610701ef7374b681f74d75bc34f29", "References": "\n <CGME20260428102910epcas5p3980610701ef7374b681f74d75bc34f29@epcas5p3.samsung.com>", "Received-SPF": "pass client-ip=203.254.224.34;\n envelope-from=ashish.a6@samsung.com; helo=mailout4.samsung.com", "X-Spam_score_int": "-43", "X-Spam_score": "-4.4", "X-Spam_bar": "----", "X-Spam_report": "(-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "The target_info union in dw_i3c_addr_assign_cmd() declares pid, bcr,\nand dcr as separate union members, causing them to all alias b[0]\nrather than their correct positions in the ENTDAA response buffer.\nThis results in dw_i3c_update_char_table() being called with BCR and\nDCR both read from b[0] instead of b[6] and b[7] respectively,\ncorrupting the device characteristics table on every ENTDAA operation.\n\nFixed this by replacing the broken members with a nested struct using\nuint8_t fields, matching the I3C spec wire format: six bytes of PID\nfollowed by BCR and DCR.\n\nSigned-off-by: Ashish Anand <ashish.a6@samsung.com>\n---\n\nThe nested struct approach avoids bitfields and __attribute__((packed)),\nboth of which introduce implementation-defined behavior for this layout.\n\nThis bug was discovered during end-to-end ENTDAA testing where BCR and\nDCR values observed in the char table register did not match the target's\nactual BCR and DCR values.\n\nA follow-up patch adding a standalone DW I3C test machine and qtest\ncoverage for ENTDAA, private transfers, and IBI is planned.\n\n hw/i3c/dw-i3c.c | 17 +++++++++++------\n 1 file changed, 11 insertions(+), 6 deletions(-)", "diff": "diff --git a/hw/i3c/dw-i3c.c b/hw/i3c/dw-i3c.c\nindex d87d42be89..1c5e09ccbb 100644\n--- a/hw/i3c/dw-i3c.c\n+++ b/hw/i3c/dw-i3c.c\n@@ -1507,9 +1507,11 @@ static void dw_i3c_addr_assign_cmd(DWI3C *s, DWI3CAddrAssignCmd cmd)\n for (i = 0; i < cmd.dev_count; i++) {\n uint8_t addr = dw_i3c_target_addr(s, cmd.dev_index + i);\n union {\n- uint64_t pid:48;\n- uint8_t bcr;\n- uint8_t dcr;\n+ struct {\n+ uint8_t pid[6];\n+ uint8_t bcr;\n+ uint8_t dcr;\n+ };\n uint32_t w[2];\n uint8_t b[8];\n } target_info;\n@@ -1544,9 +1546,12 @@ static void dw_i3c_addr_assign_cmd(DWI3C *s, DWI3CAddrAssignCmd cmd)\n err = DW_I3C_RESP_QUEUE_ERR_DAA_NACK;\n break;\n }\n- dw_i3c_update_char_table(s, cmd.dev_index + i,\n- target_info.pid, target_info.bcr,\n- target_info.dcr, addr);\n+ uint64_t pid = 0;\n+ for (int j = 0; j < 6; j++) {\n+ pid |= (uint64_t)target_info.pid[j] << (j * 8);\n+ }\n+ dw_i3c_update_char_table(s, cmd.dev_index + i, pid, target_info.bcr,\n+ target_info.dcr, addr);\n \n /* Push the PID, BCR, and DCR to the RX queue. */\n dw_i3c_push_rx(s, target_info.w[0]);\n", "prefixes": [] }