wl1251: enforce changed hw encryption support on monitor state change

The firmware doesn't support per packet encryption selection, so disable hw
encryption support completely while a monitor interface is present to support
injection of packets (which shouldn't get encrypted by hw).
To enforce the changed hw encryption support force a disassociation on
non-monitor interfaces.
For disassociation a workaround using hw connection monitor is employed,
which temporary enables hw connection manager flag.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wl1251/main.c b/drivers/net/wireless/ti/wl1251/main.c
index 5a265a24f1fe..4101693920a5 100644
--- a/drivers/net/wireless/ti/wl1251/main.c
+++ b/drivers/net/wireless/ti/wl1251/main.c
@@ -687,6 +687,16 @@ static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
                 wl->power_level = conf->power_level;
         }
 
+        /*
+         * Tell stack that connection is lost because hw encryption isn't
+         * supported in monitor mode.
+         * This requires temporary enabling of the hw connection monitor flag
+         */
+        if ((changed & IEEE80211_CONF_CHANGE_MONITOR) && wl->vif) {
+                wl->hw->flags |= IEEE80211_HW_CONNECTION_MONITOR;
+                ieee80211_connection_loss(wl->vif);
+        }
+
 out_sleep:
         wl1251_ps_elp_sleep(wl);
 
@@ -1119,6 +1129,9 @@ static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
         }
 
         if (changed & BSS_CHANGED_ASSOC) {
+                /* Disable temporary enabled hw connection monitor flag */
+                wl->hw->flags &= ~IEEE80211_HW_CONNECTION_MONITOR;
+
                 if (bss_conf->assoc) {
                         wl->beacon_int = bss_conf->beacon_int;