mac80211: add hardware restart function

Some hardware defects may require the hardware to be re-initialised
completely from scratch. Drivers would need much information (for
instance the current MAC address, crypto keys, beaconing information,
etc.) stored duplicated from mac80211 to be able to do this, so let
mac80211 help them.

The new ieee80211_restart_hw() function requires the same code as
resuming, so move that code into a new ieee80211_reconfig() function
in util.c and leave only the suspend code in pm.c.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index cb80a80504e..13d6f890ced 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -748,6 +748,8 @@ struct ieee80211_local {
         int user_power_level; /* in dBm */
         int power_constr_level; /* in dBm */
 
+        struct work_struct restart_work;
+
 #ifdef CONFIG_MAC80211_DEBUGFS
         struct local_debugfsdentries {
                 struct dentry *rcdir;
@@ -1036,15 +1038,22 @@ void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
                                  u16 capab_info, u8 *pwr_constr_elem,
                                  u8 pwr_constr_elem_len);
 
-/* Suspend/resume */
+/* Suspend/resume and hw reconfiguration */
+int ieee80211_reconfig(struct ieee80211_local *local);
+
 #ifdef CONFIG_PM
 int __ieee80211_suspend(struct ieee80211_hw *hw);
-int __ieee80211_resume(struct ieee80211_hw *hw);
+
+static inline int __ieee80211_resume(struct ieee80211_hw *hw)
+{
+        return ieee80211_reconfig(hw_to_local(hw));
+}
 #else
 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
 {
         return 0;
 }
+
 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
 {
         return 0;