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>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index b1435594921a..b166a6f9f055 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -2836,9 +2836,7 @@ static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
 
 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
                                           unsigned int changed,
-                                          unsigned int *fflags,
-                                          int mc_count,
-                                          struct dev_addr_list *mc_list)
+                                          unsigned int *fflags,u64 multicast)
 {
         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
         struct b43legacy_wldev *dev = wl->current_dev;