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GET /api/patches/2196623/?format=api
{ "id": 2196623, "url": "http://patchwork.ozlabs.org/api/patches/2196623/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260215150914.3392479-4-den@valinux.co.jp/", "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": "<20260215150914.3392479-4-den@valinux.co.jp>", "list_archive_url": null, "date": "2026-02-15T15:09:13", "name": "[3/4] PCI: endpoint: pci-epf-test: Don't free doorbell IRQ unless requested", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "815258b3b9ea3d6e3275640a35bcbefacca45509", "submitter": { "id": 91573, "url": "http://patchwork.ozlabs.org/api/people/91573/?format=api", "name": "Koichiro Den", "email": "den@valinux.co.jp" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260215150914.3392479-4-den@valinux.co.jp/mbox/", "series": [ { "id": 492223, "url": "http://patchwork.ozlabs.org/api/series/492223/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=492223", "date": "2026-02-15T15:09:10", "name": "PCI: endpoint: Doorbell-related fixes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/492223/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2196623/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196623/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-47309-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": [ 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dkim=pass header.d=valinux.co.jp; arc=none" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=valinux.co.jp;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=SH5PTHXRL1dEry0ncmWzRNUYq+nLN5BMZ776SG5Md6w=;\n b=JMQnQXxf3604Glt3bT2bLY7kufpGA7qB261VyioUqRQVMTM1MpzqgfKcHURqMQijRlq18TnQe9Eje3poM+0wjvW9i4WyN1DTUnna3WRolHjlgi7HXcbB+xz4Odd0uYjp9DiwFKOxdBqoFpd0nx3zF/o1hpo+5KbUANPsPgmQ8vM=", "From": "Koichiro Den <den@valinux.co.jp>", "To": "mani@kernel.org,\n\tkwilczynski@kernel.org,\n\tkishon@kernel.org,\n\tbhelgaas@google.com,\n\tjdmason@kudzu.us,\n\tdave.jiang@intel.com,\n\tallenbh@gmail.com,\n\tcassel@kernel.org,\n\tFrank.Li@nxp.com", "Cc": "linux-pci@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tntb@lists.linux.dev", "Subject": "[PATCH 3/4] PCI: endpoint: pci-epf-test: Don't free doorbell IRQ\n unless requested", "Date": "Mon, 16 Feb 2026 00:09:13 +0900", "Message-ID": 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", "X-OriginatorOrg": "valinux.co.jp", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n d3982c85-77d3-4c46-7e94-08de6ca43372", "X-MS-Exchange-CrossTenant-AuthSource": "TY7P286MB7722.JPNP286.PROD.OUTLOOK.COM", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "15 Feb 2026 15:09:22.7250\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "7a57bee8-f73d-4c5f-a4f7-d72c91c8c111", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n eIMlXdOSTnPkkO4uwJtSM16xtfuiS08o2vuViOA0tJg9djq1HioWhAsMxtbAvkrIt99hYMTLI6JXtIqknQZnNA==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "TY4P286MB7240" }, "content": "pci_epf_test_enable_doorbell() allocates a doorbell and then installs\nthe interrupt handler with request_threaded_irq(). On failures before\nthe IRQ is successfully requested (e.g. no free BAR,\nrequest_threaded_irq() failure), the error path jumps to\nerr_doorbell_cleanup and calls pci_epf_test_doorbell_cleanup().\n\npci_epf_test_doorbell_cleanup() unconditionally calls free_irq() for the\ndoorbell virq, which can trigger \"Trying to free already-free IRQ\"\nwarnings when the IRQ was never requested or when request_threaded_irq()\nfailed.\n\nTrack whether the doorbell IRQ has been successfully requested and only\ncall free_irq() when it has.\n\nFixes: eff0c286aa91 (\"PCI: endpoint: pci-epf-test: Add doorbell test support\")\nSigned-off-by: Koichiro Den <den@valinux.co.jp>\n---\n drivers/pci/endpoint/functions/pci-epf-test.c | 9 ++++++++-\n 1 file changed, 8 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c\nindex 148a34e51f6b..defe1e2ea427 100644\n--- a/drivers/pci/endpoint/functions/pci-epf-test.c\n+++ b/drivers/pci/endpoint/functions/pci-epf-test.c\n@@ -86,6 +86,7 @@ struct pci_epf_test {\n \tbool\t\t\tdma_private;\n \tconst struct pci_epc_features *epc_features;\n \tstruct pci_epf_bar\tdb_bar;\n+\tbool\t\t\tdb_irq_requested;\n \tsize_t\t\t\tbar_size[PCI_STD_NUM_BARS];\n };\n \n@@ -715,7 +716,10 @@ static void pci_epf_test_doorbell_cleanup(struct pci_epf_test *epf_test)\n \tstruct pci_epf_test_reg *reg = epf_test->reg[epf_test->test_reg_bar];\n \tstruct pci_epf *epf = epf_test->epf;\n \n-\tfree_irq(epf->db_msg[0].virq, epf_test);\n+\tif (epf_test->db_irq_requested && epf->db_msg) {\n+\t\tfree_irq(epf->db_msg[0].virq, epf_test);\n+\t\tepf_test->db_irq_requested = false;\n+\t}\n \treg->doorbell_bar = cpu_to_le32(NO_BAR);\n \n \tpci_epf_free_doorbell(epf);\n@@ -732,6 +736,8 @@ static void pci_epf_test_enable_doorbell(struct pci_epf_test *epf_test,\n \tsize_t offset;\n \tint ret;\n \n+\tepf_test->db_irq_requested = false;\n+\n \tret = pci_epf_alloc_doorbell(epf, 1);\n \tif (ret)\n \t\tgoto set_status_err;\n@@ -751,6 +757,7 @@ static void pci_epf_test_enable_doorbell(struct pci_epf_test *epf_test,\n \t\tgoto err_doorbell_cleanup;\n \t}\n \n+\tepf_test->db_irq_requested = true;\n \treg->doorbell_data = cpu_to_le32(msg->data);\n \treg->doorbell_bar = cpu_to_le32(bar);\n \n", "prefixes": [ "3/4" ] }