{"id":2220596,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220596/?format=json","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=json","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=json","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=json","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":{},"headers":{"Return-Path":"\n ","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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=ZjWVYtUs;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1775576158;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=aXZu/sWmQ1CtFuGs5ckBkayr+c3ycVzXDHhFa+FzP/o=;\n\tb=ZjWVYtUso4U/6GcGfK0hOzReok3xNbZa6U49LvXwcll6BdAZt2joWUn1kCjM1Yc0mKCNcD\n\t/KUKiP6Ev1QLju627hc6O5uL7XlJ2mQrZqdeisQpXeooMr9X8QRHp+PmMP3pTRA0vY1DXU\n\tktW1tAZpcVtg70yuWgwotRS/32scAGU=","X-MC-Unique":"gUGnNqi7Pbqoayj7nTeu-w-1","X-Mimecast-MFC-AGG-ID":"gUGnNqi7Pbqoayj7nTeu-w_1775576151","From":"David Jeffery ","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 ,\n\t\"Rafael J. Wysocki\" ,\n\tDanilo Krummrich ","Cc":"Tarun Sahu , Pasha Tatashin ,\n\t=?utf-8?b?TWljaGHFgiBDxYJhcGnFhHNraQ==?= ,\n Jordan Richards , Ewan Milne ,\n John Meneghini , \"Lombardi,\n Maurizio\" , Stuart Hayes ,\n Laurence Oberman , Bart Van Assche ,\n Bjorn Helgaas ,\n \"Martin K . Petersen\" ,\n David Jeffery ","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","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Scanned-By":"MIMEDefang 3.4.1 on 10.30.177.111"},"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 \nSigned-off-by: David Jeffery \nTested-by: Laurence Oberman \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"]}