From ddd9ee7cda122ac55571b8b11b51ef1e71918b63 Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Thu, 19 May 2022 17:05:14 +0200 Subject: net: mac802154: Introduce a synchronous API for MLME commands This is the slow path, we need to wait for each command to be processed before continuing so let's introduce an helper which does the transmission and blocks until it gets notified of its asynchronous completion. This helper is going to be used when introducing scan support. Signed-off-by: Miquel Raynal Acked-by: Alexander Aring Link: https://lore.kernel.org/r/20220519150516.443078-10-miquel.raynal@bootlin.com Signed-off-by: Stefan Schmidt --- net/mac802154/tx.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) (limited to 'net/mac802154/tx.c') diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index 38f74b8b6740..4827391600f6 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -128,6 +128,50 @@ int ieee802154_sync_and_hold_queue(struct ieee802154_local *local) return ieee802154_sync_queue(local); } +int ieee802154_mlme_op_pre(struct ieee802154_local *local) +{ + return ieee802154_sync_and_hold_queue(local); +} + +int ieee802154_mlme_tx(struct ieee802154_local *local, struct sk_buff *skb) +{ + int ret; + + /* Avoid possible calls to ->ndo_stop() when we asynchronously perform + * MLME transmissions. + */ + rtnl_lock(); + + /* Ensure the device was not stopped, otherwise error out */ + if (!local->open_count) { + rtnl_unlock(); + return -ENETDOWN; + } + + ieee802154_tx(local, skb); + ret = ieee802154_sync_queue(local); + + rtnl_unlock(); + + return ret; +} + +void ieee802154_mlme_op_post(struct ieee802154_local *local) +{ + ieee802154_release_queue(local); +} + +int ieee802154_mlme_tx_one(struct ieee802154_local *local, struct sk_buff *skb) +{ + int ret; + + ieee802154_mlme_op_pre(local); + ret = ieee802154_mlme_tx(local, skb); + ieee802154_mlme_op_post(local); + + return ret; +} + static netdev_tx_t ieee802154_hot_tx(struct ieee802154_local *local, struct sk_buff *skb) { -- cgit v1.2.3