iwlwifi: abstract out notification wait support

This will be sharable, but needs to live in the
op_mode as it is dependent on command processing.
Make a library out of the notification wait code.

Since I wrote all of the code originally and only
Intel employees changed it, we can also relicense
it to dual BSD/GPL.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 22 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rx.c b/drivers/net/wireless/iwlwifi/iwl-agn-rx.c
index 5c9c88b..f17142b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rx.c
@@ -1142,9 +1142,7 @@ void iwl_setup_rx_handlers(struct iwl_priv *priv)
 	priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
 
 	/* set up notification wait support */
-	spin_lock_init(&priv->shrd->notif_wait_lock);
-	INIT_LIST_HEAD(&priv->shrd->notif_waits);
-	init_waitqueue_head(&priv->shrd->notif_waitq);
+	iwl_notification_wait_init(&priv->notif_wait);
 
 	/* Set up BT Rx handlers */
 	if (cfg(priv)->lib->bt_rx_handler_setup)
@@ -1164,25 +1162,7 @@ int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
 	 * even if the RX handler consumes the RXB we have
 	 * access to it in the notification wait entry.
 	 */
-	if (!list_empty(&priv->shrd->notif_waits)) {
-		struct iwl_notification_wait *w;
-
-		spin_lock(&priv->shrd->notif_wait_lock);
-		list_for_each_entry(w, &priv->shrd->notif_waits, list) {
-			if (w->cmd != pkt->hdr.cmd)
-				continue;
-			IWL_DEBUG_RX(priv,
-				"Notif: %s, 0x%02x - wake the callers up\n",
-				get_cmd_string(pkt->hdr.cmd),
-				pkt->hdr.cmd);
-			w->triggered = true;
-			if (w->fn)
-				w->fn(priv, pkt, w->fn_data);
-		}
-		spin_unlock(&priv->shrd->notif_wait_lock);
-
-		wake_up_all(&priv->shrd->notif_waitq);
-	}
+	iwl_notification_wait_notify(&priv->notif_wait, pkt);
 
 	if (priv->pre_rx_handler &&
 	    priv->shrd->ucode_owner == IWL_OWNERSHIP_TM)