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{
    "id": 2218231,
    "url": "http://patchwork.ozlabs.org/api/patches/2218231/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260331175658.1015829-2-gaohan@iscas.ac.cn/",
    "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,
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    "msgid": "<20260331175658.1015829-2-gaohan@iscas.ac.cn>",
    "list_archive_url": null,
    "date": "2026-03-31T17:56:57",
    "name": "[1/2] PCI: Add per-device flag to disable native PCIe port services",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "e60c9039321994fa81813f237409f40b0e4311bd",
    "submitter": {
        "id": 92681,
        "url": "http://patchwork.ozlabs.org/api/people/92681/?format=api",
        "name": "Han Gao",
        "email": "gaohan@iscas.ac.cn"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260331175658.1015829-2-gaohan@iscas.ac.cn/mbox/",
    "series": [
        {
            "id": 498236,
            "url": "http://patchwork.ozlabs.org/api/series/498236/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=498236",
            "date": "2026-03-31T17:56:58",
            "name": "PCI: Allow disabling port services on broken root ports",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/498236/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2218231/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2218231/checks/",
    "tags": {},
    "related": [],
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        "From": "Han Gao <gaohan@iscas.ac.cn>",
        "To": "Bjorn Helgaas <bhelgaas@google.com>,\n =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= <u.kleine-koenig@baylibre.com>,\n Jonathan Cameron <jonathan.cameron@huawei.com>,\n Lukas Wunner <lukas@wunner.de>,\n =?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n Kees Cook <kees@kernel.org>, Han Gao <gaohan@iscas.ac.cn>,\n Chen Wang <unicorn_wang@outlook.com>, Manivannan Sadhasivam <mani@kernel.org>",
        "Cc": "linux-pci@vger.kernel.org,\n\tsophgo@lists.linux.dev,\n\tlinux-kernel@vger.kernel.org,\n\tlinux-riscv@lists.infradead.org,\n\tHan Gao <rabenda.cn@gmail.com>,\n\tIcenowy Zheng <zhengxingda@iscas.ac.cn>,\n\tInochi Amaoto <inochiama@gmail.com>,\n\tVivian Wang <wangruikang@iscas.ac.cn>,\n\tYao Zi <me@ziyao.cc>,\n\tstable@vger.kernel.org",
        "Subject": "[PATCH 1/2] PCI: Add per-device flag to disable native PCIe port\n services",
        "Date": "Wed,  1 Apr 2026 01:56:57 +0800",
        "Message-ID": "<20260331175658.1015829-2-gaohan@iscas.ac.cn>",
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        "In-Reply-To": "<20260331175658.1015829-1-gaohan@iscas.ac.cn>",
        "References": "<20260331175658.1015829-1-gaohan@iscas.ac.cn>",
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    "content": "Add PCI_DEV_FLAGS_NO_PORT_SERVICES to allow quirks to prevent the PCIe\nport service driver from probing specific devices. This provides a\nper-device equivalent of the global pcie_ports=compat kernel parameter.\n\nSome platforms have PCIe root ports that break MSI delivery to downstream\ndevices when native port services (AER, PME, bwctrl, etc.) are active.\nThe existing pci_host_bridge native_* flags do not cover all services\n(notably bwctrl), so a mechanism to skip port driver probing entirely\non a per-device basis is needed.\n\nCc: stable@vger.kernel.org\nSigned-off-by: Han Gao <gaohan@iscas.ac.cn>\n---\n drivers/pci/pcie/portdrv.c | 3 +++\n include/linux/pci.h        | 2 ++\n 2 files changed, 5 insertions(+)",
    "diff": "diff --git a/drivers/pci/pcie/portdrv.c b/drivers/pci/pcie/portdrv.c\nindex 2d6aa488fe7b..3386818d200d 100644\n--- a/drivers/pci/pcie/portdrv.c\n+++ b/drivers/pci/pcie/portdrv.c\n@@ -685,6 +685,9 @@ static const struct dev_pm_ops pcie_portdrv_pm_ops = {\n static int pcie_portdrv_probe(struct pci_dev *dev,\n \t\t\t\t\tconst struct pci_device_id *id)\n {\n+\tif (dev->dev_flags & PCI_DEV_FLAGS_NO_PORT_SERVICES)\n+\t\treturn -ENODEV;\n+\n \tint type = pci_pcie_type(dev);\n \tint status;\n \ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex 1c270f1d5123..e038fe14ef78 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -253,6 +253,8 @@ enum pci_dev_flags {\n \t * integrated with the downstream devices and doesn't use real PCI.\n \t */\n \tPCI_DEV_FLAGS_PCI_BRIDGE_NO_ALIAS = (__force pci_dev_flags_t) (1 << 14),\n+\t/* Do not use native PCIe port services (equivalent to pcie_ports=compat) */\n+\tPCI_DEV_FLAGS_NO_PORT_SERVICES = (__force pci_dev_flags_t) (1 << 15),\n };\n \n enum pci_irq_reroute_variant {\n",
    "prefixes": [
        "1/2"
    ]
}