From owner-svn-src-stable@freebsd.org Mon Jan 9 17:18:40 2017 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8EFF5CA7845; Mon, 9 Jan 2017 17:18:40 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 634B61456; Mon, 9 Jan 2017 17:18:40 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v09HIdjU088252; Mon, 9 Jan 2017 17:18:39 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v09HIdAv088251; Mon, 9 Jan 2017 17:18:39 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201701091718.v09HIdAv088251@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Mon, 9 Jan 2017 17:18:39 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r311801 - stable/11/sys/compat/linuxkpi/common/include/linux X-SVN-Group: stable-11 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Jan 2017 17:18:40 -0000 Author: hselasky Date: Mon Jan 9 17:18:39 2017 New Revision: 311801 URL: https://svnweb.freebsd.org/changeset/base/311801 Log: MFC r310553: Improve LinuxKPI device support. Only delete own BSD devices and not the ones obtained through devclass_get_device(). Some minor code cleanups while at it. Obtained from: kmacy @ Sponsored by: Mellanox Technologies Modified: stable/11/sys/compat/linuxkpi/common/include/linux/device.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/device.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/device.h Mon Jan 9 17:16:14 2017 (r311800) +++ stable/11/sys/compat/linuxkpi/common/include/linux/device.h Mon Jan 9 17:18:39 2017 (r311801) @@ -63,6 +63,14 @@ struct device { struct device *parent; struct list_head irqents; device_t bsddev; + /* + * The following flag is used to determine if the LinuxKPI is + * responsible for detaching the BSD device or not. If the + * LinuxKPI got the BSD device using devclass_get_device(), it + * must not try to detach or delete it, because it's already + * done somewhere else. + */ + bool bsddev_attached_here; dev_t devt; struct class *class; void (*release)(struct device *dev); @@ -208,23 +216,36 @@ static inline struct device *kobj_to_dev static inline void device_initialize(struct device *dev) { - device_t bsddev; + device_t bsddev = NULL; + int unit = -1; - bsddev = NULL; if (dev->devt) { - int unit = MINOR(dev->devt); + unit = MINOR(dev->devt); bsddev = devclass_get_device(dev->class->bsdclass, unit); + dev->bsddev_attached_here = false; + } else if (dev->parent == NULL) { + bsddev = devclass_get_device(dev->class->bsdclass, 0); + dev->bsddev_attached_here = false; + } else { + dev->bsddev_attached_here = true; + } + + if (bsddev == NULL && dev->parent != NULL) { + bsddev = device_add_child(dev->parent->bsddev, + dev->class->kobj.name, unit); } + if (bsddev != NULL) device_set_softc(bsddev, dev); dev->bsddev = bsddev; + MPASS(dev->bsddev != NULL); kobject_init(&dev->kobj, &linux_dev_ktype); } static inline int device_add(struct device *dev) -{ +{ if (dev->bsddev != NULL) { if (dev->devt == 0) dev->devt = makedev(0, device_get_unit(dev->bsddev)); @@ -256,13 +277,13 @@ device_create_groups_vargs(struct class goto error; } - device_initialize(dev); dev->devt = devt; dev->class = class; dev->parent = parent; dev->groups = groups; dev->release = device_create_release; - dev->bsddev = devclass_get_device(dev->class->bsdclass, MINOR(devt)); + /* device_initialize() needs the class and parent to be set */ + device_initialize(dev); dev_set_drvdata(dev, drvdata); retval = kobject_set_name_vargs(&dev->kobj, fmt, args); @@ -298,17 +319,21 @@ device_create_with_groups(struct class * static inline int device_register(struct device *dev) { - device_t bsddev; - int unit; + device_t bsddev = NULL; + int unit = -1; - bsddev = NULL; - unit = -1; + if (dev->bsddev != NULL) + goto done; if (dev->devt) { unit = MINOR(dev->devt); bsddev = devclass_get_device(dev->class->bsdclass, unit); + dev->bsddev_attached_here = false; } else if (dev->parent == NULL) { bsddev = devclass_get_device(dev->class->bsdclass, 0); + dev->bsddev_attached_here = false; + } else { + dev->bsddev_attached_here = true; } if (bsddev == NULL && dev->parent != NULL) { bsddev = device_add_child(dev->parent->bsddev, @@ -320,6 +345,7 @@ device_register(struct device *dev) device_set_softc(bsddev, dev); } dev->bsddev = bsddev; +done: kobject_init(&dev->kobj, &linux_dev_ktype); kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); @@ -334,7 +360,7 @@ device_unregister(struct device *dev) bsddev = dev->bsddev; dev->bsddev = NULL; - if (bsddev != NULL) { + if (bsddev != NULL && dev->bsddev_attached_here) { mtx_lock(&Giant); device_delete_child(device_get_parent(bsddev), bsddev); mtx_unlock(&Giant); @@ -350,7 +376,7 @@ device_del(struct device *dev) bsddev = dev->bsddev; dev->bsddev = NULL; - if (bsddev != NULL) { + if (bsddev != NULL && dev->bsddev_attached_here) { mtx_lock(&Giant); device_delete_child(device_get_parent(bsddev), bsddev); mtx_unlock(&Giant);