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GET /api/1.2/patches/2220573/?format=api
{ "id": 2220573, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2220573/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/51b10f1e82e5c9965902b34b082a4d2aa981ff8f.1775569027.git.ritesh.list@gmail.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<51b10f1e82e5c9965902b34b082a4d2aa981ff8f.1775569027.git.ritesh.list@gmail.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/51b10f1e82e5c9965902b34b082a4d2aa981ff8f.1775569027.git.ritesh.list@gmail.com/", "date": "2026-04-07T14:31:39", "name": "[RFC,v1,5/6] pseries/papr-hvpipe: Refactor and simplify hvpipe_rtas_recv_msg()", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "b558382dcda014c8ebb63052165ea9d310a3e2e8", "submitter": { "id": 79126, "url": "http://patchwork.ozlabs.org/api/1.2/people/79126/?format=api", "name": "Ritesh Harjani (IBM)", "email": "ritesh.list@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/51b10f1e82e5c9965902b34b082a4d2aa981ff8f.1775569027.git.ritesh.list@gmail.com/mbox/", "series": [ { "id": 498988, "url": "http://patchwork.ozlabs.org/api/1.2/series/498988/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498988", "date": "2026-04-07T14:31:34", "name": "pseries/papr-hvpipe: Fix and simplify papr-hvpipe", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498988/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220573/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220573/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19440-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.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=20251104 header.b=R92qxu6R;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n 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d9443c01a7336-2b277d966bdmr184775385ad.8.1775572337304;\n Tue, 07 Apr 2026 07:32:17 -0700 (PDT)", "From": "\"Ritesh Harjani (IBM)\" <ritesh.list@gmail.com>", "To": "linuxppc-dev@lists.ozlabs.org,\n\tHaren Myneni <haren@linux.ibm.com>", "Cc": "Madhavan Srinivasan <maddy@linux.ibm.com>,\n\tChristophe Leroy <chleroy@kernel.org>,\n\tVenkat Rao Bagalkote <venkat88@linux.ibm.com>,\n\tNicholas Piggin <npiggin@gmail.com>,\n\tlinux-kernel@vger.kernel.org,\n\t\"Ritesh Harjani (IBM)\" <ritesh.list@gmail.com>", "Subject": "[RFC v1 5/6] pseries/papr-hvpipe: Refactor and simplify\n hvpipe_rtas_recv_msg()", "Date": "Tue, 7 Apr 2026 20:01:39 +0530", "Message-ID": "\n <51b10f1e82e5c9965902b34b082a4d2aa981ff8f.1775569027.git.ritesh.list@gmail.com>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<cover.1775569027.git.ritesh.list@gmail.com>", "References": "<cover.1775569027.git.ritesh.list@gmail.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Simplify hvpipe_rtas_recv_msg() by removing three levels of nesting...\nif (!ret)\n if (buf)\n\tif (size < bytes_written)\n... this refactoring of the funcion ensures bail out routines are\nhandled early, to simplify the function logic.\n\nSigned-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>\n---\n arch/powerpc/platforms/pseries/papr-hvpipe.c | 52 ++++++++++----------\n 1 file changed, 26 insertions(+), 26 deletions(-)", "diff": "diff --git a/arch/powerpc/platforms/pseries/papr-hvpipe.c b/arch/powerpc/platforms/pseries/papr-hvpipe.c\nindex 7242a14eb5ec..f41f5c0a8418 100644\n--- a/arch/powerpc/platforms/pseries/papr-hvpipe.c\n+++ b/arch/powerpc/platforms/pseries/papr-hvpipe.c\n@@ -190,34 +190,34 @@ static int hvpipe_rtas_recv_msg(char __user *buf, int size)\n \t\treturn -ENOMEM;\n \t}\n \n-\tret = rtas_ibm_receive_hvpipe_msg(work_area, &srcID,\n-\t\t\t\t\t&bytes_written);\n-\tif (!ret) {\n-\t\t/*\n-\t\t * Recv HVPIPE RTAS is successful.\n-\t\t * When releasing FD or no one is waiting on the\n-\t\t * specific source, issue recv HVPIPE RTAS call\n-\t\t * so that pipe is not blocked - this func is called\n-\t\t * with NULL buf.\n-\t\t */\n-\t\tif (buf) {\n-\t\t\tif (size < bytes_written) {\n-\t\t\t\tpr_err(\"Received the payload size = %d, but the buffer size = %d\\n\",\n-\t\t\t\t\tbytes_written, size);\n-\t\t\t\tbytes_written = size;\n-\t\t\t}\n-\t\t\tif (copy_to_user(buf,\n-\t\t\t\t\trtas_work_area_raw_buf(work_area),\n-\t\t\t\t\tbytes_written))\n-\t\t\t\tret = -EFAULT;\n-\t\t\telse\n-\t\t\t\tret = bytes_written;\n-\t\t}\n-\t} else {\n-\t\tpr_err(\"ibm,receive-hvpipe-msg failed with %d\\n\",\n-\t\t\t\tret);\n+\t/*\n+\t * Recv HVPIPE RTAS is successful.\n+\t * When releasing FD or no one is waiting on the\n+\t * specific source, issue recv HVPIPE RTAS call\n+\t * so that pipe is not blocked - this func is called\n+\t * with NULL buf.\n+\t */\n+\tret = rtas_ibm_receive_hvpipe_msg(work_area, &srcID, &bytes_written);\n+\tif (ret) {\n+\t\tpr_err(\"ibm,receive-hvpipe-msg failed with %d\\n\", ret);\n+\t\tgoto out;\n \t}\n \n+\tif (!buf)\n+\t\tgoto out;\n+\n+\tif (size < bytes_written) {\n+\t\tpr_err(\"Received the payload size = %d, but the buffer size = %d\\n\",\n+\t\t\t\tbytes_written, size);\n+\t\tbytes_written = size;\n+\t}\n+\n+\tif (copy_to_user(buf, rtas_work_area_raw_buf(work_area), bytes_written))\n+\t\tret = -EFAULT;\n+\telse\n+\t\tret = bytes_written;\n+\n+out:\n \trtas_work_area_free(work_area);\n \treturn ret;\n }\n", "prefixes": [ "RFC", "v1", "5/6" ] }