wl12xx: fix roaming

The wl12xx device normally drops all frames coming from BSSID
it is not joined with.

This behavior is configured today by the wl12xx driver in response
to a handful of ieee80211_bss_change and ieee80211_conf_changed
notification flags, such as BSS_CHANGED_ASSOC, BSS_CHANGED_BSSID,
IEEE80211_CONF_CHANGE_IDLE, etc..

This breaks when we roam to a new BSSID, where authentication frames
are sent before any BSS_CHANGED/CONF_CHANGED flags are received.
When this happens the hardware silently drops the authentication
responses, and the roaming fails.

Ideally this aggressive filtering behavior of the device should be disabled
upon a notification from mac80211. Such notification will take place
after multi-channel support will be added: mac80211 will likely send a
remain-on-channel notification to drivers when entering sensitive
states (like authentication), otherwise the firmware might jump to
different channels (to serve a different role).

Until those notifications materialize, disable the hw BSSID filter
when authentication requests are sent, so roaming would work.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/io.h b/drivers/net/wireless/wl12xx/io.h
index e6199eb..36e1855 100644
--- a/drivers/net/wireless/wl12xx/io.h
+++ b/drivers/net/wireless/wl12xx/io.h
@@ -171,5 +171,6 @@ int wl1271_free_hw(struct wl1271 *wl);
 irqreturn_t wl1271_irq(int irq, void *data);
 bool wl1271_set_block_size(struct wl1271 *wl);
 int wl1271_tx_dummy_packet(struct wl1271 *wl);
+void wl1271_configure_filters(struct wl1271 *wl, unsigned int filters);
 
 #endif