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{
    "id": 2220596,
    "url": "http://patchwork.ozlabs.org/api/1.1/patches/2220596/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260407153532.6395-2-djeffery@redhat.com/",
    "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": "<20260407153532.6395-2-djeffery@redhat.com>",
    "date": "2026-04-07T15:35:28",
    "name": "[1/5] driver core: separate function to shutdown one device",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "bb0f21284663b9d835b7143908502187083890e1",
    "submitter": {
        "id": 24471,
        "url": "http://patchwork.ozlabs.org/api/1.1/people/24471/?format=api",
        "name": "David Jeffery",
        "email": "djeffery@redhat.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260407153532.6395-2-djeffery@redhat.com/mbox/",
    "series": [
        {
            "id": 498998,
            "url": "http://patchwork.ozlabs.org/api/1.1/series/498998/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=498998",
            "date": "2026-04-07T15:35:27",
            "name": "shut down devices asynchronously",
            "version": 13,
            "mbox": "http://patchwork.ozlabs.org/series/498998/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2220596/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2220596/checks/",
    "tags": {},
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        "From": "David Jeffery <djeffery@redhat.com>",
        "To": "linux-kernel@vger.kernel.org,\n\tdriver-core@lists.linux.dev,\n\tlinux-pci@vger.kernel.org,\n\tlinux-scsi@vger.kernel.org,\n\tGreg Kroah-Hartman <gregkh@linuxfoundation.org>,\n\t\"Rafael J. Wysocki\" <rafael@kernel.org>,\n\tDanilo Krummrich <dakr@kernel.org>",
        "Cc": "Tarun Sahu <tarunsahu@google.com>, Pasha Tatashin <tatashin@google.com>,\n\t=?utf-8?b?TWljaGHFgiBDxYJhcGnFhHNraQ==?= <mclapinski@google.com>,\n Jordan Richards <jordanrichards@google.com>, Ewan Milne <emilne@redhat.com>,\n John Meneghini <jmeneghi@redhat.com>, \"Lombardi,\n Maurizio\" <mlombard@redhat.com>, Stuart Hayes <stuart.w.hayes@gmail.com>,\n Laurence Oberman <loberman@redhat.com>, Bart Van Assche <bvanassche@acm.org>,\n Bjorn Helgaas <helgaas@kernel.org>,\n \"Martin K . Petersen\" <martin.petersen@oracle.com>,\n David Jeffery <djeffery@redhat.com>",
        "Subject": "[PATCH 1/5] driver core: separate function to shutdown one device",
        "Date": "Tue,  7 Apr 2026 11:35:28 -0400",
        "Message-ID": "<20260407153532.6395-2-djeffery@redhat.com>",
        "In-Reply-To": "<20260407153532.6395-1-djeffery@redhat.com>",
        "References": "<20260407153532.6395-1-djeffery@redhat.com>",
        "Precedence": "bulk",
        "X-Mailing-List": "linux-pci@vger.kernel.org",
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    },
    "content": "Make a separate function for the part of device_shutdown() that does the\nshutown for a single device.  This is in preparation for making device\nshutdown asynchronous.\n\nSigned-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>\nSigned-off-by: David Jeffery <djeffery@redhat.com>\nTested-by: Laurence Oberman <loberman@redhat.com>\n---\n drivers/base/core.c | 71 +++++++++++++++++++++++++--------------------\n 1 file changed, 39 insertions(+), 32 deletions(-)",
    "diff": "diff --git a/drivers/base/core.c b/drivers/base/core.c\nindex 09b98f02f559..fabd17be1175 100644\n--- a/drivers/base/core.c\n+++ b/drivers/base/core.c\n@@ -4784,12 +4784,48 @@ int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid)\n \treturn error;\n }\n \n+static void shutdown_one_device(struct device *dev)\n+{\n+\tstruct device *parent = dev->parent;\n+\n+\t/* hold lock to avoid race with probe/release */\n+\tif (parent)\n+\t\tdevice_lock(parent);\n+\tdevice_lock(dev);\n+\n+\t/* Don't allow any more runtime suspends */\n+\tpm_runtime_get_noresume(dev);\n+\tpm_runtime_barrier(dev);\n+\n+\tif (dev->class && dev->class->shutdown_pre) {\n+\t\tif (initcall_debug)\n+\t\t\tdev_info(dev, \"shutdown_pre\\n\");\n+\t\tdev->class->shutdown_pre(dev);\n+\t}\n+\tif (dev->bus && dev->bus->shutdown) {\n+\t\tif (initcall_debug)\n+\t\t\tdev_info(dev, \"shutdown\\n\");\n+\t\tdev->bus->shutdown(dev);\n+\t} else if (dev->driver && dev->driver->shutdown) {\n+\t\tif (initcall_debug)\n+\t\t\tdev_info(dev, \"shutdown\\n\");\n+\t\tdev->driver->shutdown(dev);\n+\t}\n+\n+\tdevice_unlock(dev);\n+\tif (parent)\n+\t\tdevice_unlock(parent);\n+\n+\tput_device(parent);\n+\tput_device(dev);\n+}\n+\n /**\n  * device_shutdown - call ->shutdown() on each device to shutdown.\n  */\n void device_shutdown(void)\n {\n-\tstruct device *dev, *parent;\n+\tstruct device *dev;\n \n \twait_for_device_probe();\n \tdevice_block_probing();\n@@ -4811,7 +4847,7 @@ void device_shutdown(void)\n \t\t * prevent it from being freed because parent's\n \t\t * lock is to be held\n \t\t */\n-\t\tparent = get_device(dev->parent);\n+\t\tget_device(dev->parent);\n \t\tget_device(dev);\n \t\t/*\n \t\t * Make sure the device is off the kset list, in the\n@@ -4820,36 +4856,7 @@ void device_shutdown(void)\n \t\tlist_del_init(&dev->kobj.entry);\n \t\tspin_unlock(&devices_kset->list_lock);\n \n-\t\t/* hold lock to avoid race with probe/release */\n-\t\tif (parent)\n-\t\t\tdevice_lock(parent);\n-\t\tdevice_lock(dev);\n-\n-\t\t/* Don't allow any more runtime suspends */\n-\t\tpm_runtime_get_noresume(dev);\n-\t\tpm_runtime_barrier(dev);\n-\n-\t\tif (dev->class && dev->class->shutdown_pre) {\n-\t\t\tif (initcall_debug)\n-\t\t\t\tdev_info(dev, \"shutdown_pre\\n\");\n-\t\t\tdev->class->shutdown_pre(dev);\n-\t\t}\n-\t\tif (dev->bus && dev->bus->shutdown) {\n-\t\t\tif (initcall_debug)\n-\t\t\t\tdev_info(dev, \"shutdown\\n\");\n-\t\t\tdev->bus->shutdown(dev);\n-\t\t} else if (dev->driver && dev->driver->shutdown) {\n-\t\t\tif (initcall_debug)\n-\t\t\t\tdev_info(dev, \"shutdown\\n\");\n-\t\t\tdev->driver->shutdown(dev);\n-\t\t}\n-\n-\t\tdevice_unlock(dev);\n-\t\tif (parent)\n-\t\t\tdevice_unlock(parent);\n-\n-\t\tput_device(dev);\n-\t\tput_device(parent);\n+\t\tshutdown_one_device(dev);\n \n \t\tspin_lock(&devices_kset->list_lock);\n \t}\n",
    "prefixes": [
        "1/5"
    ]
}