cfg80211: don't allow WoWLAN support without CONFIG_PM

When CONFIG_PM is disabled, no device can possibly
support WoWLAN since it can't go to sleep to start
with. Due to this, mac80211 had even rejected the
hardware registration. By making all the code and
data for WoWLAN depend on CONFIG_PM we can promote
this runtime error to a compile-time error.

Add #ifdef around all WoWLAN code to remove it in
systems that don't need it as they never suspend.

Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Acked-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 234ff3bbd104..067c9fe02a7f 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1112,6 +1112,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
                 nla_nest_end(msg, nl_ifs);
         }
 
+#ifdef CONFIG_PM
         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
                 struct nlattr *nl_wowlan;
 
@@ -1152,6 +1153,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 
                 nla_nest_end(msg, nl_wowlan);
         }
+#endif
 
         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
                                 dev->wiphy.software_iftypes))
@@ -6276,6 +6278,7 @@ static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
         return cfg80211_leave_mesh(rdev, dev);
 }
 
+#ifdef CONFIG_PM
 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
 {
         struct cfg80211_registered_device *rdev = info->user_ptr[0];
@@ -6504,6 +6507,7 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
         kfree(new_triggers.patterns);
         return err;
 }
+#endif
 
 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
 {
@@ -7158,6 +7162,7 @@ static struct genl_ops nl80211_ops[] = {
                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
+#ifdef CONFIG_PM
         {
                 .cmd = NL80211_CMD_GET_WOWLAN,
                 .doit = nl80211_get_wowlan,
@@ -7174,6 +7179,7 @@ static struct genl_ops nl80211_ops[] = {
                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
                                   NL80211_FLAG_NEED_RTNL,
         },
+#endif
         {
                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
                 .doit = nl80211_set_rekey_data,