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GET /api/1.0/patches/2196678/?format=api
{ "id": 2196678, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2196678/?format=api", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.0/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 }, "msgid": "<SI2PR01MB439352E0D54243099CAAA118DC6CA@SI2PR01MB4393.apcprd01.prod.exchangelabs.com>", "date": "2026-02-16T02:26:39", "name": "[v5,3/6] PCI: Consolidate delimiter handling into pci_dev_str_match()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "4dd4db6176e90b1f314d385d7106e3e35fde6a3f", "submitter": { "id": 92382, "url": "http://patchwork.ozlabs.org/api/1.0/people/92382/?format=api", "name": "Wei Wang", "email": "wei.w.wang@hotmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/SI2PR01MB439352E0D54243099CAAA118DC6CA@SI2PR01MB4393.apcprd01.prod.exchangelabs.com/mbox/", "series": [ { "id": 492242, "url": "http://patchwork.ozlabs.org/api/1.0/series/492242/?format=api", "date": "2026-02-16T02:26:36", "name": "PCI: Add support for ACS Enhanced Capability", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/492242/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196678/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-47326-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@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=hotmail.com header.i=@hotmail.com header.a=rsa-sha256\n header.s=selector1 header.b=mAGUs4qW;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n 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b=mAGUs4qWmtkNDF/PqcwCAtsltiqedMKc3+ma/tQvVYG4mCcWzrrCmgB+3r9Ze4+QYJOR1IvBoGmtcBUWsps4t3u9I6WNwjXlIOO9rzd6gyNn4LwliXOcj7IkvhWGuxJpv0cPnnVgbcjBp7ifdfOvF0hV6kYt/0BAD11hNljPIxD2+rP6VaVNkd4aZBA3oamkyy9R+0cybetPiLJXn6fYcUQCUIWBrmpJRAcxeW5ak3PvT9F7jBDQ1HdEuzWveoffdaCOBvDdy5x1SfxVtH+4qm52/7MZE4C+RBFc7SQ4erC2kxFm2LAV+QaV1wZ85HPQpZPUC78QIL9PM3feAfxCsw==", "From": "Wei Wang <wei.w.wang@hotmail.com>", "To": "bhelgaas@google.com,\n\tjgg@nvidia.com,\n\tjonathan.cameron@huawei.com,\n\takpm@linux-foundation.org,\n\tbp@alien8.de,\n\trdunlap@infradead.org,\n\talex@shazbot.org,\n\tkevin.tian@intel.com", "Cc": "linux-kernel@vger.kernel.org,\n\tlinux-pci@vger.kernel.org,\n\twei.w.wang@hotmail.com", "Subject": "[PATCH v5 3/6] PCI: Consolidate delimiter handling into\n pci_dev_str_match()", "Date": "Mon, 16 Feb 2026 10:26:39 +0800", "Message-ID": "\n <SI2PR01MB439352E0D54243099CAAA118DC6CA@SI2PR01MB4393.apcprd01.prod.exchangelabs.com>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "\n 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", "X-OriginatorOrg": "sct-15-20-9412-4-msonline-outlook-5f51e.templateTenant", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 86ca9f9e-3d54-434a-ace8-08de6d02e837", "X-MS-Exchange-CrossTenant-AuthSource": "\n SI2PR01MB4393.apcprd01.prod.exchangelabs.com", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "16 Feb 2026 02:27:19.0934\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa", "X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg": "\n\t00000000-0000-0000-0000-000000000000", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "SEYPR01MB5340" }, "content": "Callers of pci_dev_str_match() manually checked for the ';' or ','\ndelimiter and advanced the parameter pointer past it. Move this common\nlogic into pci_dev_str_match() so callers no longer need to duplicate it.\n\nWhen no delimiter is found (end of parameter list or malformed entry),\npci_dev_str_match() now returns -ENODEV to indicate that no further entries\ncan be parsed, preserving the previous caller behavior of stopping parsing.\n\nSigned-off-by: Wei Wang <wei.w.wang@hotmail.com>\n---\n drivers/pci/pci.c | 43 +++++++++++++++++++++----------------------\n 1 file changed, 21 insertions(+), 22 deletions(-)", "diff": "diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c\nindex 8973658441ec..0f0b384e782f 100644\n--- a/drivers/pci/pci.c\n+++ b/drivers/pci/pci.c\n@@ -344,7 +344,7 @@ static int pci_dev_str_match_path(struct pci_dev *dev, const char *path,\n * pci_dev_str_match - test if a string matches a device\n * @dev: the PCI device to test\n * @p: string to match the device against\n- * @endptr: pointer to the string after the match\n+ * @endptr: pointer to the string after the match, with the delimiter skipped\n *\n * Test if a string (typically from a kernel parameter) matches a specified\n * PCI device. The string may be of one of the following formats:\n@@ -384,8 +384,10 @@ static int pci_dev_str_match(struct pci_dev *dev, const char *p,\n \t\t\t &subsystem_vendor, &subsystem_device, &count);\n \t\tif (ret != 4) {\n \t\t\tret = sscanf(p, \"%hx:%hx%n\", &vendor, &device, &count);\n-\t\t\tif (ret != 2)\n-\t\t\t\treturn -EINVAL;\n+\t\t\tif (ret != 2) {\n+\t\t\t\tret = -EINVAL;\n+\t\t\t\tgoto not_found;\n+\t\t\t}\n \n \t\t\tsubsystem_vendor = 0;\n \t\t\tsubsystem_device = 0;\n@@ -407,16 +409,28 @@ static int pci_dev_str_match(struct pci_dev *dev, const char *p,\n \t\t */\n \t\tret = pci_dev_str_match_path(dev, p, &p);\n \t\tif (ret < 0)\n-\t\t\treturn ret;\n+\t\t\tgoto not_found;\n \t\telse if (ret)\n \t\t\tgoto found;\n \t}\n \n-\t*endptr = p;\n-\treturn 0;\n+not_found:\n+\tif (ret < 0)\n+\t\tpr_err(\"PCI: Can't parse parameter: %s\\n\", p);\n+\n+\tif (*p != ';' && *p != ',') {\n+\t\t/*\n+\t\t * End of param or invalid format. Return -ENODEV so the caller\n+\t\t * stops parsing.\n+\t\t */\n+\t\treturn -ENODEV;\n+\t}\n+\n+\t*endptr = p + 1;\n+\treturn ret;\n \n found:\n-\t*endptr = p;\n+\t*endptr = *p == '\\0' ? p : p + 1;\n \treturn 1;\n }\n \n@@ -943,18 +957,11 @@ static void __pci_config_acs(struct pci_dev *dev, struct pci_acs *caps,\n \n \t\tret = pci_dev_str_match(dev, p, &p);\n \t\tif (ret < 0) {\n-\t\t\tpr_info_once(\"PCI: Can't parse ACS command line parameter\\n\");\n \t\t\tbreak;\n \t\t} else if (ret == 1) {\n \t\t\t/* Found a match */\n \t\t\tbreak;\n \t\t}\n-\n-\t\tif (*p != ';' && *p != ',') {\n-\t\t\t/* End of param or invalid format */\n-\t\t\tbreak;\n-\t\t}\n-\t\tp++;\n \t}\n \n \tif (ret != 1)\n@@ -6382,16 +6389,8 @@ static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev,\n \t\t\talign = 1ULL << align_order;\n \t\t\tbreak;\n \t\t} else if (ret < 0) {\n-\t\t\tpr_err(\"PCI: Can't parse resource_alignment parameter: %s\\n\",\n-\t\t\t p);\n \t\t\tbreak;\n \t\t}\n-\n-\t\tif (*p != ';' && *p != ',') {\n-\t\t\t/* End of param or invalid format */\n-\t\t\tbreak;\n-\t\t}\n-\t\tp++;\n \t}\n out:\n \tspin_unlock(&resource_alignment_lock);\n", "prefixes": [ "v5", "3/6" ] }