From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BAE9DCD13D2 for ; Wed, 29 Apr 2026 17:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:content-type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/C64blJM3Kjz6Rlhck7tMz+JFCKWeVjDfMx7FPCDn24=; b=td7AcP8CtCmEZ7B1cGChNtPs/N kJhtaPuzzwQIRD1KOF4qF3eJUCvpFTdNuqyXBCfLfbBzWsXzuJpH9FOBT0krAGm26Jr17RFr9bjUx aNY7myaKS63f6Dea10t8VfA4BcFn4ZK07k3nKq2qRgfoyjm0lQqKKLsHpKd557RLJkMh5jGabz4at bh/FVjB+qb4zOgeq3LvFNBrAwU4qORXqCWOJJKo+vAcogdREJNvP0cw3wG4S47eg92jaAk6HpA6ep wKk+yTqBl5DLak5H7UH/c1r98ARYiltccmHm3PhMDTDlKHXciFI+GxSTXCn9SomnXPPYs2Cs5CP6M TgTf6PmA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wI95S-00000003zvo-0Xcf; Wed, 29 Apr 2026 17:52:38 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wI95L-00000003ztu-3xC3 for kexec@lists.infradead.org; Wed, 29 Apr 2026 17:52:33 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777485150; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/C64blJM3Kjz6Rlhck7tMz+JFCKWeVjDfMx7FPCDn24=; b=LOyUzBBtnNlZsh7AWw4V5XffWvXTsa0Y3iqgTBGcTcOY8xxLDKoKLpfBeb8ZTnj55vv9sJ 7BwCA6ytpDUhaAPWg6XYq1WIQYVsxDFKfa6BT1swnKg+Hv+xMqwFbD6LCkpnjaIigRFpeK m3PeSri84JhqTaqhesFe0D9XjpttCpA= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-344-dKMwVYqFMc6TdsCEsQTSYg-1; Wed, 29 Apr 2026 13:50:56 -0400 X-MC-Unique: dKMwVYqFMc6TdsCEsQTSYg-1 X-Mimecast-MFC-AGG-ID: dKMwVYqFMc6TdsCEsQTSYg_1777485053 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3009518005AA; Wed, 29 Apr 2026 17:50:53 +0000 (UTC) Received: from fedora-work.redhat.com (unknown [10.22.80.165]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 25DDE300019F; Wed, 29 Apr 2026 17:50:47 +0000 (UTC) From: David Jeffery To: linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: Tarun Sahu , Pasha Tatashin , =?UTF-8?q?Micha=C5=82=20C=C5=82api=C5=84ski?= , Jordan Richards , Ewan Milne , John Meneghini , "Lombardi, Maurizio" , Stuart Hayes , Laurence Oberman , Bart Van Assche , Bjorn Helgaas , "Martin K . Petersen" , John Garry , kexec@lists.infradead.org, David Jeffery , Pasha Tatashin Subject: [PATCH 1/5] driver core: separate function to shutdown one device Date: Wed, 29 Apr 2026 13:50:12 -0400 Message-ID: <20260429175016.7915-2-djeffery@redhat.com> In-Reply-To: <20260429175016.7915-1-djeffery@redhat.com> References: <20260429175016.7915-1-djeffery@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: FPwtWKiBDj-3WxJAkJoJDGgJ-0cQPrZEpJKXuPCK3ZA_1777485053 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260429_105232_049348_FEFDC85A X-CRM114-Status: GOOD ( 17.30 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Make a separate function for the part of device_shutdown() that does the shutown for a single device. This is in preparation for making device shutdown asynchronous. Signed-off-by: Stuart Hayes Signed-off-by: David Jeffery Tested-by: Laurence Oberman Reviewed-by: Martin K. Petersen Reviewed-by: Pasha Tatashin --- drivers/base/core.c | 71 +++++++++++++++++++++++++-------------------- 1 file changed, 39 insertions(+), 32 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index bd2ddf2aab50..90ef21c1e713 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -4799,12 +4799,48 @@ int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid) return error; } +static void shutdown_one_device(struct device *dev) +{ + struct device *parent = dev->parent; + + /* hold lock to avoid race with probe/release */ + if (parent) + device_lock(parent); + device_lock(dev); + + /* Don't allow any more runtime suspends */ + pm_runtime_get_noresume(dev); + pm_runtime_barrier(dev); + + if (dev->class && dev->class->shutdown_pre) { + if (initcall_debug) + dev_info(dev, "shutdown_pre\n"); + dev->class->shutdown_pre(dev); + } + if (dev->bus && dev->bus->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->bus->shutdown(dev); + } else if (dev->driver && dev->driver->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->driver->shutdown(dev); + } + + device_unlock(dev); + if (parent) + device_unlock(parent); + + put_device(parent); + put_device(dev); +} + /** * device_shutdown - call ->shutdown() on each device to shutdown. */ void device_shutdown(void) { - struct device *dev, *parent; + struct device *dev; wait_for_device_probe(); device_block_probing(); @@ -4826,7 +4862,7 @@ void device_shutdown(void) * prevent it from being freed because parent's * lock is to be held */ - parent = get_device(dev->parent); + get_device(dev->parent); get_device(dev); /* * Make sure the device is off the kset list, in the @@ -4835,36 +4871,7 @@ void device_shutdown(void) list_del_init(&dev->kobj.entry); spin_unlock(&devices_kset->list_lock); - /* hold lock to avoid race with probe/release */ - if (parent) - device_lock(parent); - device_lock(dev); - - /* Don't allow any more runtime suspends */ - pm_runtime_get_noresume(dev); - pm_runtime_barrier(dev); - - if (dev->class && dev->class->shutdown_pre) { - if (initcall_debug) - dev_info(dev, "shutdown_pre\n"); - dev->class->shutdown_pre(dev); - } - if (dev->bus && dev->bus->shutdown) { - if (initcall_debug) - dev_info(dev, "shutdown\n"); - dev->bus->shutdown(dev); - } else if (dev->driver && dev->driver->shutdown) { - if (initcall_debug) - dev_info(dev, "shutdown\n"); - dev->driver->shutdown(dev); - } - - device_unlock(dev); - if (parent) - device_unlock(parent); - - put_device(dev); - put_device(parent); + shutdown_one_device(dev); spin_lock(&devices_kset->list_lock); } -- 2.53.0