/* * Copyright (C) 2003-2008 Takahiro Hirofuchi * * This is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, * USA. */ #include #include #include #include "usbip_common.h" #include "stub.h" #define DRIVER_AUTHOR "Takahiro Hirofuchi" #define DRIVER_DESC "USB/IP Host Driver" struct kmem_cache *stub_priv_cache; /* * busid_tables defines matching busids that usbip can grab. A user can change * dynamically what device is locally used and what device is exported to a * remote host. */ #define MAX_BUSID 16 static struct bus_id_priv busid_table[MAX_BUSID]; static spinlock_t busid_table_lock; static void init_busid_table(void) { /* * This also sets the bus_table[i].status to * STUB_BUSID_OTHER, which is 0. */ memset(busid_table, 0, sizeof(busid_table)); spin_lock_init(&busid_table_lock); } /* * Find the index of the busid by name. * Must be called with busid_table_lock held. */ static int get_busid_idx(const char *busid) { int i; int idx = -1; for (i = 0; i < MAX_BUSID; i++) if (busid_table[i].name[0]) if (!strncmp(busid_table[i].name, busid, BUSID_SIZE)) { idx = i; break; } return idx; } struct bus_id_priv *get_busid_priv(const char *busid) { int idx; struct bus_id_priv *bid = NULL; spin_lock(&busid_table_lock); idx = get_busid_idx(busid); if (idx >= 0) bid = &(busid_table[idx]); spin_unlock(&busid_table_lock); return bid; } static int add_match_busid(char *busid) { int i; int ret = -1; spin_lock(&busid_table_lock); /* already registered? */ if (get_busid_idx(busid) >= 0) { ret = 0; goto out; } for (i = 0; i < MAX_BUSID; i++) if (!busid_table[i].name[0]) { strlcpy(busid_table[i].name, busid, BUSID_SIZE); if ((busid_table[i].status != STUB_BUSID_ALLOC) && (busid_table[i].status != STUB_BUSID_REMOV)) busid_table[i].status = STUB_BUSID_ADDED; ret = 0; break; } out: spin_unlock(&busid_table_lock); return ret; } int del_match_busid(char *busid) { int idx; int ret = -1; spin_lock(&busid_table_lock); idx = get_busid_idx(busid); if (idx < 0) goto out; /* found */ ret = 0; if (busid_table[idx].status == STUB_BUSID_OTHER) memset(busid_table[idx].name, 0, BUSID_SIZE); if ((busid_table[idx].status != STUB_BUSID_OTHER) && (busid_table[idx].status != STUB_BUSID_ADDED)) busid_table[idx].status = STUB_BUSID_REMOV; out: spin_unlock(&busid_table_lock); return ret; } static ssize_t show_match_busid(struct device_driver *drv, char *buf) { int i; char *out = buf; spin_lock(&busid_table_lock); for (i = 0; i < MAX_BUSID; i++) if (busid_table[i].name[0]) out += sprintf(out, "%s ", busid_table[i].name); spin_unlock(&busid_table_lock); out += sprintf(out, "\n"); return out - buf; } static ssize_t store_match_busid(struct device_driver *dev, const char *buf, size_t count) { int len; char busid[BUSID_SIZE]; if (count < 5) return -EINVAL; /* busid needs to include \0 termination */ len = strlcpy(busid, buf + 4, BUSID_SIZE); if (sizeof(busid) <= len) return -EINVAL; if (!strncmp(buf, "add ", 4)) { if (add_match_busid(busid) < 0) return -ENOMEM; pr_debug("add busid %s\n", busid); return count; } if (!strncmp(buf, "del ", 4)) { if (del_match_busid(busid) < 0) return -ENODEV; pr_debug("del busid %s\n", busid); return count; } return -EINVAL; } static DRIVER_ATTR(match_busid, S_IRUSR | S_IWUSR, show_match_busid, store_match_busid); static ssize_t rebind_store(struct device_driver *dev, const char *buf, size_t count) { int ret; int len; struct bus_id_priv *bid; /* buf length should be less that BUSID_SIZE */ len = strnlen(buf, BUSID_SIZE); if (!(len < BUSID_SIZE)) return -EINVAL; bid = get_busid_priv(buf); if (!bid) return -ENODEV; ret = device_attach(&bid->udev->dev); if (ret < 0) { dev_err(&bid->udev->dev, "rebind failed\n"); return ret; } return count; } static DRIVER_ATTR_WO(rebind); static struct stub_priv *stub_priv_pop_from_listhead(struct list_head *listhead) { struct stub_priv *priv, *tmp; list_for_each_entry_safe(priv, tmp, listhead, list) { list_del(&priv->list); return priv; } return NULL; } static struct stub_priv *stub_priv_pop(struct stub_device *sdev) { unsigned long flags; struct stub_priv *priv; spin_lock_irqsave(&sdev->priv_lock, flags); priv = stub_priv_pop_from_listhead(&sdev->priv_init); if (priv) goto done; priv = stub_priv_pop_from_listhead(&sdev->priv_tx); if (priv) goto done; priv = stub_priv_pop_from_listhead(&sdev->priv_free); done: spin_unlock_irqrestore(&sdev->priv_lock, flags); return priv; } void stub_device_cleanup_urbs(struct stub_device *sdev) { struct stub_priv *priv; struct urb *urb; dev_dbg(&sdev->udev->dev, "free sdev %p\n", sdev); while ((priv = stub_priv_pop(sdev))) { urb = priv->urb; dev_dbg(&sdev->udev->dev, "free urb %p\n", urb); usb_kill_urb(urb); kmem_cache_free(stub_priv_cache, priv); kfree(urb->transfer_buffer); kfree(urb->setup_packet); usb_free_urb(urb); } } static int __init usbip_host_init(void) { int ret; init_busid_table(); stub_priv_cache = KMEM_CACHE(stub_priv, SLAB_HWCACHE_ALIGN); if (!stub_priv_cache) { pr_err("kmem_cache_create failed\n"); return -ENOMEM; } ret = usb_register_device_driver(&stub_driver, THIS_MODULE); if (ret) { pr_err("usb_register failed %d\n", ret); goto err_usb_register; } ret = driver_create_file(&stub_driver.drvwrap.driver, &driver_attr_match_busid); if (ret) { pr_err("driver_create_file failed\n"); goto err_create_file; } ret = driver_create_file(&stub_driver.drvwrap.driver, &driver_attr_rebind); if (ret) { pr_err("driver_create_file failed\n"); goto err_create_file; } pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); return ret; err_create_file: usb_deregister_device_driver(&stub_driver); err_usb_register: kmem_cache_destroy(stub_priv_cache); return ret; } static void __exit usbip_host_exit(void) { driver_remove_file(&stub_driver.drvwrap.driver, &driver_attr_match_busid); driver_remove_file(&stub_driver.drvwrap.driver, &driver_attr_rebind); /* * deregister() calls stub_disconnect() for all devices. Device * specific data is cleared in stub_disconnect(). */ usb_deregister_device_driver(&stub_driver); kmem_cache_destroy(stub_priv_cache); } module_init(usbip_host_init); module_exit(usbip_host_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_VERSION(USBIP_VERSION); so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/atm/atm_sysfs.c')