cfg80211: remove a local variable
[linux-3.10.git] / net / wireless / sysfs.c
1 /*
2  * This file provides /sys/class/ieee80211/<wiphy name>/
3  * and some default attributes.
4  *
5  * Copyright 2005-2006  Jiri Benc <jbenc@suse.cz>
6  * Copyright 2006       Johannes Berg <johannes@sipsolutions.net>
7  *
8  * This file is GPLv2 as found in COPYING.
9  */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <net/cfg80211.h>
17 #include "sysfs.h"
18 #include "core.h"
19 #include "rdev-ops.h"
20
21 static inline struct cfg80211_registered_device *dev_to_rdev(
22         struct device *dev)
23 {
24         return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
25 }
26
27 #define SHOW_FMT(name, fmt, member)                                     \
28 static ssize_t name ## _show(struct device *dev,                        \
29                               struct device_attribute *attr,            \
30                               char *buf)                                \
31 {                                                                       \
32         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
33 }
34
35 SHOW_FMT(index, "%d", wiphy_idx);
36 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
37 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
38
39 static ssize_t name_show(struct device *dev,
40                          struct device_attribute *attr,
41                          char *buf) {
42         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
43         return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
44 }
45
46
47 static ssize_t addresses_show(struct device *dev,
48                               struct device_attribute *attr,
49                               char *buf)
50 {
51         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
52         char *start = buf;
53         int i;
54
55         if (!wiphy->addresses)
56                 return sprintf(buf, "%pM\n", wiphy->perm_addr);
57
58         for (i = 0; i < wiphy->n_addresses; i++)
59                 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
60
61         return buf - start;
62 }
63
64 static struct device_attribute ieee80211_dev_attrs[] = {
65         __ATTR_RO(index),
66         __ATTR_RO(macaddress),
67         __ATTR_RO(address_mask),
68         __ATTR_RO(addresses),
69         __ATTR_RO(name),
70         {}
71 };
72
73 static void wiphy_dev_release(struct device *dev)
74 {
75         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
76
77         cfg80211_dev_free(rdev);
78 }
79
80 #ifdef CONFIG_HOTPLUG
81 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
82 {
83         /* TODO, we probably need stuff here */
84         return 0;
85 }
86 #endif
87
88 static int wiphy_suspend(struct device *dev, pm_message_t state)
89 {
90         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
91         int ret = 0;
92
93         rdev->suspend_at = get_seconds();
94
95         if (rdev->ops->suspend) {
96                 rtnl_lock();
97                 if (rdev->wiphy.registered)
98                         ret = rdev_suspend(rdev);
99                 rtnl_unlock();
100         }
101
102         return ret;
103 }
104
105 static int wiphy_resume(struct device *dev)
106 {
107         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
108         int ret = 0;
109
110         /* Age scan results with time spent in suspend */
111         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
112
113         if (rdev->ops->resume) {
114                 rtnl_lock();
115                 if (rdev->wiphy.registered)
116                         ret = rdev_resume(rdev);
117                 rtnl_unlock();
118         }
119
120         return ret;
121 }
122
123 static const void *wiphy_namespace(struct device *d)
124 {
125         struct wiphy *wiphy = container_of(d, struct wiphy, dev);
126
127         return wiphy_net(wiphy);
128 }
129
130 struct class ieee80211_class = {
131         .name = "ieee80211",
132         .owner = THIS_MODULE,
133         .dev_release = wiphy_dev_release,
134         .dev_attrs = ieee80211_dev_attrs,
135 #ifdef CONFIG_HOTPLUG
136         .dev_uevent = wiphy_uevent,
137 #endif
138         .suspend = wiphy_suspend,
139         .resume = wiphy_resume,
140         .ns_type = &net_ns_type_operations,
141         .namespace = wiphy_namespace,
142 };
143
144 int wiphy_sysfs_init(void)
145 {
146         return class_register(&ieee80211_class);
147 }
148
149 void wiphy_sysfs_exit(void)
150 {
151         class_unregister(&ieee80211_class);
152 }