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GET /api/1.1/patches/2220503/?format=api
{ "id": 2220503, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2220503/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260407124421.282766-2-mani@kernel.org/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.1/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": "<20260407124421.282766-2-mani@kernel.org>", "date": "2026-04-07T12:44:20", "name": "[1/2] PCI: endpoint: pci-epf-vntb: Add check to detect 'db_count' value of 0", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "00b3c170af2f4696ee31b3d8fa74dc790f10a078", "submitter": { "id": 91273, "url": "http://patchwork.ozlabs.org/api/1.1/people/91273/?format=api", "name": "Manivannan Sadhasivam", "email": "manivannan.sadhasivam@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260407124421.282766-2-mani@kernel.org/mbox/", "series": [ { "id": 498977, "url": "http://patchwork.ozlabs.org/api/1.1/series/498977/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=498977", "date": "2026-04-07T12:44:19", "name": "PCI: endpoint: pci-epf-{v}ntb: A couple of fixes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498977/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220503/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220503/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-52054-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=qualcomm.com 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"X-Received": [ "by 2002:a05:6a00:a0f:b0:829:8a84:b9fc with SMTP id\n d2e1a72fcca58-82d0da33e8fmr15483564b3a.8.1775565885130;\n Tue, 07 Apr 2026 05:44:45 -0700 (PDT)", "by 2002:a05:6a00:a0f:b0:829:8a84:b9fc with SMTP id\n d2e1a72fcca58-82d0da33e8fmr15483524b3a.8.1775565884435;\n Tue, 07 Apr 2026 05:44:44 -0700 (PDT)" ], "From": "Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>", "X-Google-Original-From": "Manivannan Sadhasivam <mani@kernel.org>", "To": "mani@kernel.org, kwilczynski@kernel.org, kishon@kernel.org,\n bhelgaas@google.com", "Cc": "jdmason@kudzu.us, dave.jiang@intel.com, allenbh@gmail.com,\n ntb@lists.linux.dev, linux-pci@vger.kernel.org,\n linux-kernel@vger.kernel.org, den@valinux.co.jp, Frank.li@nxp.com,\n Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>", "Subject": "[PATCH 1/2] PCI: endpoint: pci-epf-vntb: Add check to detect\n 'db_count' value of 0", "Date": "Tue, 7 Apr 2026 18:14:20 +0530", "Message-ID": "<20260407124421.282766-2-mani@kernel.org>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260407124421.282766-1-mani@kernel.org>", "References": "<20260407124421.282766-1-mani@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA3MDExOSBTYWx0ZWRfXwFypcZNOQGSK\n 6yTjW6RCTsQ4IVQ4q4zkzJP2RAohWIwDuX+iQ8ZbK1fB/kKMrdYDxEu3LcrB0nLdkSyVbajcN7N\n +Ile5X4/zwuyFrtOMTOPd8wpsbtqf3urLbcurkjmiCl9EpXpyUTUageDpyEGJaPywav4VKipzvN\n Iwxwlgk1zxnbIx8FPqHwFDgkJJrxHpQ5KeOTsoGWgmQOVJH5KSAbs5LlI//3t7ZoPZjAK/73TnE\n c+I0lh8kem7XY0rY5mmL7sYJgR4ph5K1E7IBMvIb0aCx4M9C0n2fPxG6wBLAg5C6gaQqzWVH4L9\n dXXe1iH9RjIaZUpwmM4UiisQbGTrxDgOHWbxoqS97asfmWWd8LjXi8bxkmRjBkJxKYkSTEthQkB\n 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authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000\n definitions=main-2604070119" }, "content": "From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>\n\nepf_ntb::db_count value should be within 1 to MAX_DB_COUNT. Current code\nonly checks for the upper bound, while the lower bound is unchecked. This\ncan cause a lot of issues in the driver if the user passes 'db_count' as 0.\n\nSo add a check for 0 also. While at it, remove the redundant 'db_count'\nassignment.\n\nFixes: e35f56bb0330 (\"PCI: endpoint: Support NTB transfer between RC and EP\")\nSigned-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>\n---\n drivers/pci/endpoint/functions/pci-epf-vntb.c | 9 +++------\n 1 file changed, 3 insertions(+), 6 deletions(-)", "diff": "diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c\nindex 2256c3062b1a..3d30aa4dbb84 100644\n--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c\n+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c\n@@ -483,7 +483,6 @@ static int epf_ntb_configure_interrupt(struct epf_ntb *ntb)\n {\n \tconst struct pci_epc_features *epc_features;\n \tstruct device *dev;\n-\tu32 db_count;\n \tint ret;\n \n \tdev = &ntb->epf->dev;\n@@ -495,14 +494,12 @@ static int epf_ntb_configure_interrupt(struct epf_ntb *ntb)\n \t\treturn -EINVAL;\n \t}\n \n-\tdb_count = ntb->db_count;\n-\tif (db_count > MAX_DB_COUNT) {\n-\t\tdev_err(dev, \"DB count cannot be more than %d\\n\", MAX_DB_COUNT);\n+\tif (!ntb->db_count || ntb->db_count > MAX_DB_COUNT) {\n+\t\tdev_err(dev, \"DB count %d out of range (1 - %d)\\n\",\n+\t\t\tntb->db_count, MAX_DB_COUNT);\n \t\treturn -EINVAL;\n \t}\n \n-\tntb->db_count = db_count;\n-\n \tif (epc_features->msi_capable) {\n \t\tret = pci_epc_set_msi(ntb->epf->epc,\n \t\t\t\t ntb->epf->func_no,\n", "prefixes": [ "1/2" ] }