wl12xx: don't remove key if hlid was already deleted

If hlid was already removed, there is no need to remove
its key (it might cause a fw crash, as the key is invalid).

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index d655e62..261807b 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -1203,6 +1203,10 @@
 	struct wl1271_cmd_set_keys *cmd;
 	int ret = 0;
 
+	/* hlid might have already been deleted */
+	if (wl->sta_hlid == WL12XX_INVALID_LINK_ID)
+		return 0;
+
 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 	if (!cmd) {
 		ret = -ENOMEM;