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GET /api/patches/819329/?format=api
{ "id": 819329, "url": "http://patchwork.ozlabs.org/api/patches/819329/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20170927214220.41216-2-gvaradar@cisco.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170927214220.41216-2-gvaradar@cisco.com>", "list_archive_url": null, "date": "2017-09-27T21:42:17", "name": "[1/4] pci: introduce __pci_walk_bus for caller with pci_bus_sem held", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "b8172854a2f9a512b283d14e5cc569b8cb3423f5", "submitter": { "id": 46073, "url": "http://patchwork.ozlabs.org/api/people/46073/?format=api", "name": "Govindarajulu Varadarajan", "email": "gvaradar@cisco.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20170927214220.41216-2-gvaradar@cisco.com/mbox/", "series": [ { "id": 5455, "url": "http://patchwork.ozlabs.org/api/series/5455/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=5455", "date": "2017-09-27T21:42:16", "name": "pci aer: fix deadlock in do_recovery", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/5455/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/819329/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/819329/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linux-pci-owner@vger.kernel.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=linux-pci-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=cisco.com header.i=@cisco.com\n\theader.b=\"OGhwSXO0\"; dkim-atps=neutral" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2Wm53Rcyz9t67\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 28 Sep 2017 07:53:25 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752144AbdI0Vwa (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tWed, 27 Sep 2017 17:52:30 -0400", "from rcdn-iport-4.cisco.com ([173.37.86.75]:6653 \"EHLO\n\trcdn-iport-4.cisco.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751905AbdI0Vw2 (ORCPT\n\t<rfc822; linux-pci@vger.kernel.org>); Wed, 27 Sep 2017 17:52:28 -0400", "from alln-core-6.cisco.com ([173.36.13.139])\n\tby rcdn-iport-4.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA;\n\t27 Sep 2017 21:43:01 +0000", "from a6.cisco.com (arch-kvm-vm.cisco.com [10.193.184.6])\n\t(authenticated bits=0)\n\tby alln-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id v8RLgpwf021066\n\t(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);\n\tWed, 27 Sep 2017 21:43:01 GMT" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n\td=cisco.com; i=@cisco.com; l=2173; q=dns/txt; s=iport;\n\tt=1506549148; x=1507758748;\n\th=from:to:cc:subject:date:message-id:in-reply-to: references;\n\tbh=X7fSRQLsZ211tIM61Y9UPjaMS0toQmqfB5PzzOy2iUs=;\n\tb=OGhwSXO0h94x0o6c2D/zVSVYYXsCslVsSURupnyP/UZk7mTeM0jkBLzw\n\tMy3oZhIjfQn7yRi/6itzqphsU+Icx/189IqXiQJrw4Nxodm/s9PSgqRyr\n\tJ2Nix9yXGEYNtmX9tcAkq+eXcXZ2RQ/3BXVyTTcOZozG+6iYemdmoLUug k=;", "X-IronPort-AV": "E=Sophos;i=\"5.42,446,1500940800\"; d=\"scan'208\";a=\"300794028\"", "From": "Govindarajulu Varadarajan <gvaradar@cisco.com>", "To": "benve@cisco.com, bhelgaas@google.com, linux-pci@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org, jlbec@evilplan.org, hch@lst.de,\n\tmingo@redhat.com, peterz@infradead.org", "Cc": "Govindarajulu Varadarajan <gvaradar@cisco.com>", "Subject": "[PATCH 1/4] pci: introduce __pci_walk_bus for caller with\n\tpci_bus_sem held", "Date": "Wed, 27 Sep 2017 14:42:17 -0700", "Message-Id": "<20170927214220.41216-2-gvaradar@cisco.com>", "X-Mailer": "git-send-email 2.14.1", "In-Reply-To": "<20170927214220.41216-1-gvaradar@cisco.com>", "References": "<20170927214220.41216-1-gvaradar@cisco.com>", "X-Authenticated-User": "gvaradar@cisco.com", "Sender": "linux-pci-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<linux-pci.vger.kernel.org>", "X-Mailing-List": "linux-pci@vger.kernel.org" }, "content": "Move pci_bus_sem down/up out of pci_walk_bus and rename it to\n__pci_walk_bus. Caller who already hold pci_bus_sem can call\n__pci_walk_bus.\n\nSigned-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>\n---\n drivers/pci/bus.c | 13 +++++++++++--\n include/linux/pci.h | 2 ++\n 2 files changed, 13 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c\nindex bc56cf19afd3..3cababe74af0 100644\n--- a/drivers/pci/bus.c\n+++ b/drivers/pci/bus.c\n@@ -376,8 +376,10 @@ EXPORT_SYMBOL(pci_bus_add_devices);\n * We check the return of @cb each time. If it returns anything\n * other than 0, we break out.\n *\n+ * Should be called with read pci_bus_sem held.\n+ *\n */\n-void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n+void __pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n \t\t void *userdata)\n {\n \tstruct pci_dev *dev;\n@@ -386,7 +388,6 @@ void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n \tint retval;\n \n \tbus = top;\n-\tdown_read(&pci_bus_sem);\n \tnext = top->devices.next;\n \tfor (;;) {\n \t\tif (next == &bus->devices) {\n@@ -409,6 +410,14 @@ void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n \t\tif (retval)\n \t\t\tbreak;\n \t}\n+}\n+EXPORT_SYMBOL_GPL(__pci_walk_bus);\n+\n+void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n+\t\t void *userdata)\n+{\n+\tdown_read(&pci_bus_sem);\n+\t__pci_walk_bus(top, cb, userdata);\n \tup_read(&pci_bus_sem);\n }\n EXPORT_SYMBOL_GPL(pci_walk_bus);\ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex f68c58a93dd0..b4b1a8a164c0 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -1297,6 +1297,8 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,\n \n void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n \t\t void *userdata);\n+void __pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),\n+\t\t void *userdata);\n int pci_cfg_space_size(struct pci_dev *dev);\n unsigned char pci_bus_max_busnr(struct pci_bus *bus);\n void pci_setup_bridge(struct pci_bus *bus);\n", "prefixes": [ "1/4" ] }