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Date: Tue, 7 Aug 2018 07:07:20 +0800
From: kbuild test robot <lkp@...el.com>
To: Alexander Aring <aring@...atatu.com>
Cc: kbuild-all@...org, netdev@...r.kernel.org,
Stefan Schmidt <stefan@...enfreihafen.org>
Subject: [net-next:master 1745/1753]
drivers/net/ieee802154/mac802154_hwsim.c:39:14: sparse: incorrect type in
initializer (different address spaces)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: de7de576eca204de9a38e2f6dafe6b7c1ddc85c1
commit: f25da51fdc381ca2863248c7060b3662632f0872 [1745/1753] ieee802154: hwsim: add replacement for fakelb
reproduce:
# apt-get install sparse
git checkout f25da51fdc381ca2863248c7060b3662632f0872
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/net/ieee802154/mac802154_hwsim.c:39:14: sparse: incorrect type in initializer (different address spaces) @@ expected struct list_head *next @@ got struct list_head struct list_head *next @@
drivers/net/ieee802154/mac802154_hwsim.c:39:14: expected struct list_head *next
drivers/net/ieee802154/mac802154_hwsim.c:39:14: got struct list_head [noderef] <asn:4>*<noident>
>> drivers/net/ieee802154/mac802154_hwsim.c:39:14: sparse: incorrect type in initializer (different address spaces) @@ expected struct list_head *prev @@ got struct list_head struct list_head *prev @@
drivers/net/ieee802154/mac802154_hwsim.c:39:14: expected struct list_head *prev
drivers/net/ieee802154/mac802154_hwsim.c:39:14: got struct list_head [noderef] <asn:4>*<noident>
>> drivers/net/ieee802154/mac802154_hwsim.c:799:18: sparse: incorrect type in assignment (different address spaces) @@ expected struct hwsim_pib [noderef] <asn:4>*pib @@ got hwsim_pib [noderef] <asn:4>*pib @@
drivers/net/ieee802154/mac802154_hwsim.c:799:18: expected struct hwsim_pib [noderef] <asn:4>*pib
drivers/net/ieee802154/mac802154_hwsim.c:799:18: got struct hwsim_pib *[assigned] pib
>> drivers/net/ieee802154/mac802154_hwsim.c:801:25: sparse: incorrect type in argument 1 (different modifiers) @@ expected struct list_head *list @@ got struct lisstruct list_head *list @@
drivers/net/ieee802154/mac802154_hwsim.c:801:25: expected struct list_head *list
drivers/net/ieee802154/mac802154_hwsim.c:801:25: got struct list_head [noderef] *<noident>
>> drivers/net/ieee802154/mac802154_hwsim.c:835:9: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct callback_head *head @@ got struct callback_hstruct callback_head *head @@
drivers/net/ieee802154/mac802154_hwsim.c:835:9: expected struct callback_head *head
drivers/net/ieee802154/mac802154_hwsim.c:835:9: got struct callback_head [noderef] <asn:4>*<noident>
>> drivers/net/ieee802154/mac802154_hwsim.c:113:17: sparse: incorrect type in assignment (different address spaces) @@ expected struct hwsim_pib *pib_old @@ got struct hwsim_pib struct hwsim_pib *pib_old @@
drivers/net/ieee802154/mac802154_hwsim.c:113:17: expected struct hwsim_pib *pib_old
drivers/net/ieee802154/mac802154_hwsim.c:113:17: got struct hwsim_pib [noderef] <asn:4>*pib
>> drivers/net/ieee802154/mac802154_hwsim.c:130:9: sparse: incompatible types in comparison expression (different modifiers)
>> drivers/net/ieee802154/mac802154_hwsim.c:144:33: sparse: incompatible types in comparison expression (different address spaces)
>> drivers/net/ieee802154/mac802154_hwsim.c:161:40: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct list_head *head @@ got struct list_head struct list_head *head @@
drivers/net/ieee802154/mac802154_hwsim.c:161:40: expected struct list_head *head
drivers/net/ieee802154/mac802154_hwsim.c:161:40: got struct list_head [noderef] <asn:4>*<noident>
>> drivers/net/ieee802154/mac802154_hwsim.c:232:25: sparse: incorrect type in argument 1 (different modifiers) @@ expected struct list_head const *head @@ got strustruct list_head const *head @@
drivers/net/ieee802154/mac802154_hwsim.c:232:25: expected struct list_head const *head
drivers/net/ieee802154/mac802154_hwsim.c:232:25: got struct list_head [noderef] *<noident>
drivers/net/ieee802154/mac802154_hwsim.c:243:9: sparse: incompatible types in comparison expression (different modifiers)
drivers/net/ieee802154/mac802154_hwsim.c:260:25: sparse: incompatible types in comparison expression (different address spaces)
drivers/net/ieee802154/mac802154_hwsim.c:460:9: sparse: incompatible types in comparison expression (different modifiers)
drivers/net/ieee802154/mac802154_hwsim.c:515:9: sparse: incompatible types in comparison expression (different modifiers)
drivers/net/ieee802154/mac802154_hwsim.c:573:9: sparse: incompatible types in comparison expression (different modifiers)
drivers/net/ieee802154/mac802154_hwsim.c:695:17: sparse: incompatible types in comparison expression (different modifiers)
>> drivers/net/ieee802154/mac802154_hwsim.c:717:41: sparse: incorrect type in argument 2 (different modifiers) @@ expected struct list_head *head @@ got struct lisstruct list_head *head @@
drivers/net/ieee802154/mac802154_hwsim.c:717:41: expected struct list_head *head
drivers/net/ieee802154/mac802154_hwsim.c:717:41: got struct list_head [noderef] *<noident>
drivers/net/ieee802154/mac802154_hwsim.c:725:41: sparse: incorrect type in argument 2 (different modifiers) @@ expected struct list_head *head @@ got struct lisstruct list_head *head @@
drivers/net/ieee802154/mac802154_hwsim.c:725:41: expected struct list_head *head
drivers/net/ieee802154/mac802154_hwsim.c:725:41: got struct list_head [noderef] *<noident>
vim +39 drivers/net/ieee802154/mac802154_hwsim.c
38
> 39 static __rcu LIST_HEAD(hwsim_ifup_phys);
40
41 static struct platform_device *mac802154hwsim_dev;
42
43 /* MAC802154_HWSIM netlink family */
44 static struct genl_family hwsim_genl_family;
45
46 static int hwsim_radio_idx;
47
48 enum hwsim_multicast_groups {
49 HWSIM_MCGRP_CONFIG,
50 };
51
52 static const struct genl_multicast_group hwsim_mcgrps[] = {
53 [HWSIM_MCGRP_CONFIG] = { .name = "config", },
54 };
55
56 struct hwsim_pib {
57 u8 page;
58 u8 channel;
59
60 struct rcu_head rcu;
61 };
62
63 struct hwsim_edge_info {
64 u8 lqi;
65
66 struct rcu_head rcu;
67 };
68
69 struct hwsim_edge {
70 struct hwsim_phy *endpoint;
71 struct hwsim_edge_info *info;
72
73 struct list_head list;
74 struct rcu_head rcu;
75 };
76
77 struct hwsim_phy {
78 struct ieee802154_hw *hw;
79 u32 idx;
80
81 struct hwsim_pib __rcu *pib;
82
83 bool suspended;
84 struct list_head __rcu edges;
85
86 struct list_head list;
87 struct list_head list_ifup;
88 };
89
90 static int hwsim_add_one(struct genl_info *info, struct device *dev,
91 bool init);
92 static void hwsim_del(struct hwsim_phy *phy);
93
94 static int hwsim_hw_ed(struct ieee802154_hw *hw, u8 *level)
95 {
96 *level = 0xbe;
97
98 return 0;
99 }
100
101 static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
102 {
103 struct hwsim_phy *phy = hw->priv;
104 struct hwsim_pib *pib, *pib_old;
105
106 pib = kzalloc(sizeof(*pib), GFP_KERNEL);
107 if (!pib)
108 return -ENOMEM;
109
110 pib->page = page;
111 pib->channel = channel;
112
> 113 pib_old = phy->pib;
114 rcu_assign_pointer(phy->pib, pib);
115 kfree_rcu(pib_old, rcu);
116 return 0;
117 }
118
119 static int hwsim_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
120 {
121 struct hwsim_phy *current_phy = hw->priv;
122 struct hwsim_pib *current_pib, *endpoint_pib;
123 struct hwsim_edge_info *einfo;
124 struct hwsim_edge *e;
125
126 WARN_ON(current_phy->suspended);
127
128 rcu_read_lock();
129 current_pib = rcu_dereference(current_phy->pib);
> 130 list_for_each_entry_rcu(e, ¤t_phy->edges, list) {
131 /* Can be changed later in rx_irqsafe, but this is only a
132 * performance tweak. Received radio should drop the frame
133 * in mac802154 stack anyway... so we don't need to be
134 * 100% of locking here to check on suspended
135 */
136 if (e->endpoint->suspended)
137 continue;
138
139 endpoint_pib = rcu_dereference(e->endpoint->pib);
140 if (current_pib->page == endpoint_pib->page &&
141 current_pib->channel == endpoint_pib->channel) {
142 struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
143
> 144 einfo = rcu_dereference(e->info);
145 if (newskb)
146 ieee802154_rx_irqsafe(e->endpoint->hw, newskb,
147 einfo->lqi);
148 }
149 }
150 rcu_read_unlock();
151
152 ieee802154_xmit_complete(hw, skb, false);
153 return 0;
154 }
155
156 static int hwsim_hw_start(struct ieee802154_hw *hw)
157 {
158 struct hwsim_phy *phy = hw->priv;
159
160 phy->suspended = false;
> 161 list_add_rcu(&phy->list_ifup, &hwsim_ifup_phys);
162 synchronize_rcu();
163
164 return 0;
165 }
166
167 static void hwsim_hw_stop(struct ieee802154_hw *hw)
168 {
169 struct hwsim_phy *phy = hw->priv;
170
171 phy->suspended = true;
172 list_del_rcu(&phy->list_ifup);
173 synchronize_rcu();
174 }
175
176 static int
177 hwsim_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
178 {
179 return 0;
180 }
181
182 static const struct ieee802154_ops hwsim_ops = {
183 .owner = THIS_MODULE,
184 .xmit_async = hwsim_hw_xmit,
185 .ed = hwsim_hw_ed,
186 .set_channel = hwsim_hw_channel,
187 .start = hwsim_hw_start,
188 .stop = hwsim_hw_stop,
189 .set_promiscuous_mode = hwsim_set_promiscuous_mode,
190 };
191
192 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
193 {
194 return hwsim_add_one(info, &mac802154hwsim_dev->dev, false);
195 }
196
197 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
198 {
199 struct hwsim_phy *phy, *tmp;
200 s64 idx = -1;
201
202 if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID])
203 return -EINVAL;
204
205 idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
206
207 mutex_lock(&hwsim_phys_lock);
208 list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) {
209 if (idx == phy->idx) {
210 hwsim_del(phy);
211 mutex_unlock(&hwsim_phys_lock);
212 return 0;
213 }
214 }
215 mutex_unlock(&hwsim_phys_lock);
216
217 return -ENODEV;
218 }
219
220 static int append_radio_msg(struct sk_buff *skb, struct hwsim_phy *phy)
221 {
222 struct nlattr *nl_edges, *nl_edge;
223 struct hwsim_edge_info *einfo;
224 struct hwsim_edge *e;
225 int ret;
226
227 ret = nla_put_u32(skb, MAC802154_HWSIM_ATTR_RADIO_ID, phy->idx);
228 if (ret < 0)
229 return ret;
230
231 rcu_read_lock();
> 232 if (list_empty(&phy->edges)) {
233 rcu_read_unlock();
234 return 0;
235 }
236
237 nl_edges = nla_nest_start(skb, MAC802154_HWSIM_ATTR_RADIO_EDGES);
238 if (!nl_edges) {
239 rcu_read_unlock();
240 return -ENOBUFS;
241 }
242
243 list_for_each_entry_rcu(e, &phy->edges, list) {
244 nl_edge = nla_nest_start(skb, MAC802154_HWSIM_ATTR_RADIO_EDGE);
245 if (!nl_edge) {
246 rcu_read_unlock();
247 nla_nest_cancel(skb, nl_edges);
248 return -ENOBUFS;
249 }
250
251 ret = nla_put_u32(skb, MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID,
252 e->endpoint->idx);
253 if (ret < 0) {
254 rcu_read_unlock();
255 nla_nest_cancel(skb, nl_edge);
256 nla_nest_cancel(skb, nl_edges);
257 return ret;
258 }
259
260 einfo = rcu_dereference(e->info);
261 ret = nla_put_u8(skb, MAC802154_HWSIM_EDGE_ATTR_LQI,
262 einfo->lqi);
263 if (ret < 0) {
264 rcu_read_unlock();
265 nla_nest_cancel(skb, nl_edge);
266 nla_nest_cancel(skb, nl_edges);
267 return ret;
268 }
269
270 nla_nest_end(skb, nl_edge);
271 }
272 rcu_read_unlock();
273
274 nla_nest_end(skb, nl_edges);
275
276 return 0;
277 }
278
---
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