mac80211: allow configure_filter callback to sleep

Over time, a whole bunch of drivers have come up
with their own scheme to delay the configure_filter
operation to a workqueue. To be able to simplify
things, allow configure_filter to sleep, and add
a new prepare_multicast callback that drivers that
need the multicast address list implement. This new
callback must be atomic, but most drivers either
don't care or just calculate a hash which can be
done atomically and then uploaded to the hardware
non-atomically.

A cursory look suggests that at76c50x-usb, ar9170,
mwl8k (which is actually very broken now), rt2x00,
wl1251, wl1271 and zd1211 should make use of this
new capability.

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

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 99e89596cef6..39d7d9baafdd 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -978,7 +978,7 @@ int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
                                 unsigned int changed_flags,
                                 unsigned int *total_flags,
-                                int mc_count, struct dev_addr_list *mc_list);
+                                u64 multicast);
 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
                       bool set);
 #ifdef CONFIG_RT2X00_LIB_CRYPTO
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index cb7b6d459331..602f12699718 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -379,7 +379,7 @@ EXPORT_SYMBOL_GPL(rt2x00mac_config);
 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
                                 unsigned int changed_flags,
                                 unsigned int *total_flags,
-                                int mc_count, struct dev_addr_list *mc_list)
+                                u64 multicast)
 {
         struct rt2x00_dev *rt2x00dev = hw->priv;