From patchwork Fri Jan 10 13:57:28 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tejun Heo X-Patchwork-Id: 309280 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 7E9D12C00A3 for ; Sat, 11 Jan 2014 01:00:39 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757544AbaAJN7y (ORCPT ); Fri, 10 Jan 2014 08:59:54 -0500 Received: from mail-qa0-f48.google.com ([209.85.216.48]:38563 "EHLO mail-qa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755293AbaAJN5w (ORCPT ); Fri, 10 Jan 2014 08:57:52 -0500 Received: by mail-qa0-f48.google.com with SMTP id i13so4130279qae.7 for ; Fri, 10 Jan 2014 05:57:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=PK3CvSoQT96pXuHWNU1hK4rAASioH29XYlrb6HPPr1A=; b=w5DaDZIbmyHFoUtmJe5U3UwMr/6UEoAPQxfQk+GofLSSI/+wxGhqzdSkzoPWVuSHub 9XknR1z1lSUj6Rs51xskz5KkkuoHMZzHYyF+ctvgHHYxeULUHaTmzo7rzuwVhVvgvcU5 cdA1iZ+26JkAnL7I0KRGI8JmdgHhf0ljOXMpnGQD6iULlzHuTAQBE6w1Uq37Pb+J4Vm+ ldV1m3GD7v6odP4A47tzAHkIyBAbheW+GCHDJXD5fnPuDvObdIUiaPWyvQZ2DLHRKkgS TjpKUwl5UmijWusKNfasQ56j56mV2CchbW56G2XftPIHuIodk0J32bbIBjOfY+Z5g9SH AtvQ== X-Received: by 10.49.2.132 with SMTP id 4mr7670978qeu.15.1389362272249; Fri, 10 Jan 2014 05:57:52 -0800 (PST) Received: from htj.dyndns.org.com (207-38-225-25.c3-0.43d-ubr1.qens-43d.ny.cable.rcn.com. [207.38.225.25]) by mx.google.com with ESMTPSA id y6sm12711360qen.21.2014.01.10.05.57.50 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 10 Jan 2014 05:57:51 -0800 (PST) From: Tejun Heo To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, stern@rowland.harvard.edu, JBottomley@parallels.com, bhelgaas@google.com, Tejun Heo , linux-pci@vger.kernel.org Subject: [PATCH 11/14] pci: use device_remove_file_self() instead of device_schedule_callback() Date: Fri, 10 Jan 2014 08:57:28 -0500 Message-Id: <1389362251-8128-12-git-send-email-tj@kernel.org> X-Mailer: git-send-email 1.8.4.2 In-Reply-To: <1389362251-8128-1-git-send-email-tj@kernel.org> References: <1389362251-8128-1-git-send-email-tj@kernel.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org driver-core now supports synchrnous self-deletion of attributes and the asynchrnous removal mechanism is scheduled for removal. Use it instead of device_schedule_callback(). This makes "remove" behave synchronously. Signed-off-by: Tejun Heo Cc: Bjorn Helgaas Cc: linux-pci@vger.kernel.org --- drivers/pci/pci-sysfs.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index c91e6c1..94d1cb8 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -352,32 +352,20 @@ static struct device_attribute dev_rescan_attr = __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store); -static void remove_callback(struct device *dev) -{ - struct pci_dev *pdev = to_pci_dev(dev); - - mutex_lock(&pci_remove_rescan_mutex); - pci_stop_and_remove_bus_device(pdev); - mutex_unlock(&pci_remove_rescan_mutex); -} - static ssize_t -remove_store(struct device *dev, struct device_attribute *dummy, +remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - int ret = 0; unsigned long val; if (kstrtoul(buf, 0, &val) < 0) return -EINVAL; - /* An attribute cannot be unregistered by one of its own methods, - * so we have to use this roundabout approach. - */ - if (val) - ret = device_schedule_callback(dev, remove_callback); - if (ret) - count = ret; + if (val && device_remove_file_self(dev, attr)) { + mutex_lock(&pci_remove_rescan_mutex); + pci_stop_and_remove_bus_device(to_pci_dev(dev)); + mutex_unlock(&pci_remove_rescan_mutex); + } return count; } static struct device_attribute dev_remove_attr = __ATTR(remove,