From 8f451829dd97fb22f03844ca52a49828e2e1d666 Mon Sep 17 00:00:00 2001 From: Varka Bhadram Date: Tue, 23 Jun 2015 11:41:03 +0530 Subject: mac802154: use WARN_ON() macro This patch will generate the warning if the required driver ops were not defined. Also it removes unnecessary debug message. Signed-off-by: Varka Bhadram Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- net/mac802154/main.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'net/mac802154/main.c') diff --git a/net/mac802154/main.c b/net/mac802154/main.c index 356b346e1ee8..4caf04b676d7 100644 --- a/net/mac802154/main.c +++ b/net/mac802154/main.c @@ -58,11 +58,9 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) struct ieee802154_local *local; size_t priv_size; - if (!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || - !ops->start || !ops->stop || !ops->set_channel) { - pr_err("undefined IEEE802.15.4 device operations\n"); + if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || + !ops->start || !ops->stop || !ops->set_channel)) return NULL; - } /* Ensure 32-byte alignment of our private data and hw private data. * We use the wpan_phy priv data for both our ieee802154_local and for -- cgit v1.2.3 From d10270ce941ee89afd74076ea3ed8dbef8a0ff25 Mon Sep 17 00:00:00 2001 From: Varka Bhadram Date: Tue, 7 Jul 2015 10:50:43 +0530 Subject: mac802154: fix ieee802154_rx handling Instead of passing ieee802154_hw pointer to ieee802154_rx, we can directly pass the ieee802154_local pointer. Signed-off-by: Varka Bhadram Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- net/mac802154/ieee802154_i.h | 2 +- net/mac802154/main.c | 2 +- net/mac802154/rx.c | 3 +-- 3 files changed, 3 insertions(+), 4 deletions(-) (limited to 'net/mac802154/main.c') diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h index eb8502a6e719..6810d7a25aca 100644 --- a/net/mac802154/ieee802154_i.h +++ b/net/mac802154/ieee802154_i.h @@ -124,7 +124,7 @@ ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata) extern struct ieee802154_mlme_ops mac802154_mlme_wpan; -void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb); +void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb); netdev_tx_t ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev); netdev_tx_t diff --git a/net/mac802154/main.c b/net/mac802154/main.c index 4caf04b676d7..91f120845a45 100644 --- a/net/mac802154/main.c +++ b/net/mac802154/main.c @@ -40,7 +40,7 @@ static void ieee802154_tasklet_handler(unsigned long data) * netstack. */ skb->pkt_type = 0; - ieee802154_rx(&local->hw, skb); + ieee802154_rx(local, skb); break; default: WARN(1, "mac802154: Packet is of unknown type %d\n", diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index 7791c9b8cb57..d1c33c1d6b9b 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -246,9 +246,8 @@ ieee802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb) } } -void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb) +void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb) { - struct ieee802154_local *local = hw_to_local(hw); u16 crc; WARN_ON_ONCE(softirq_count() == 0); -- cgit v1.2.3 From c22ff7b4e74d8136a9911d8b8d0f25f9f7c3edc1 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Tue, 21 Jul 2015 17:44:47 +0300 Subject: mac802154: Fix memory corruption with global deferred transmit state. When transmitting a packet via a mac802154 driver that can sleep in its transmit function, mac802154 defers the call to the driver's transmit function to a per-device workqueue. However, mac802154 uses a single global work_struct for this, which means that if you have more than one registered mac802154 interface in the system, and you transmit on more than one of them at the same time, you'll very easily cause memory corruption. This patch moves the deferred transmit processing state from global variables to struct ieee802154_local, and this seems to fix the memory corruption issue. Signed-off-by: Lennert Buytenhek Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- net/mac802154/ieee802154_i.h | 4 ++++ net/mac802154/main.c | 2 ++ net/mac802154/tx.c | 27 ++++++--------------------- 3 files changed, 12 insertions(+), 21 deletions(-) (limited to 'net/mac802154/main.c') diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h index 6810d7a25aca..56ccffa3f2bf 100644 --- a/net/mac802154/ieee802154_i.h +++ b/net/mac802154/ieee802154_i.h @@ -60,6 +60,9 @@ struct ieee802154_local { struct tasklet_struct tasklet; struct sk_buff_head skb_queue; + + struct sk_buff *tx_skb; + struct work_struct tx_work; }; enum { @@ -125,6 +128,7 @@ ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata) extern struct ieee802154_mlme_ops mac802154_mlme_wpan; void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb); +void ieee802154_xmit_worker(struct work_struct *work); netdev_tx_t ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev); netdev_tx_t diff --git a/net/mac802154/main.c b/net/mac802154/main.c index 91f120845a45..9e55431b9a5c 100644 --- a/net/mac802154/main.c +++ b/net/mac802154/main.c @@ -105,6 +105,8 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) skb_queue_head_init(&local->skb_queue); + INIT_WORK(&local->tx_work, ieee802154_xmit_worker); + /* init supported flags with 802.15.4 default ranges */ phy->supported.max_minbe = 8; phy->supported.min_maxbe = 3; diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index c62e95695c78..7ed439172f30 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -30,23 +30,11 @@ #include "ieee802154_i.h" #include "driver-ops.h" -/* IEEE 802.15.4 transceivers can sleep during the xmit session, so process - * packets through the workqueue. - */ -struct ieee802154_xmit_cb { - struct sk_buff *skb; - struct work_struct work; - struct ieee802154_local *local; -}; - -static struct ieee802154_xmit_cb ieee802154_xmit_cb; - -static void ieee802154_xmit_worker(struct work_struct *work) +void ieee802154_xmit_worker(struct work_struct *work) { - struct ieee802154_xmit_cb *cb = - container_of(work, struct ieee802154_xmit_cb, work); - struct ieee802154_local *local = cb->local; - struct sk_buff *skb = cb->skb; + struct ieee802154_local *local = + container_of(work, struct ieee802154_local, tx_work); + struct sk_buff *skb = local->tx_skb; struct net_device *dev = skb->dev; int res; @@ -106,11 +94,8 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb) dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; } else { - INIT_WORK(&ieee802154_xmit_cb.work, ieee802154_xmit_worker); - ieee802154_xmit_cb.skb = skb; - ieee802154_xmit_cb.local = local; - - queue_work(local->workqueue, &ieee802154_xmit_cb.work); + local->tx_skb = skb; + queue_work(local->workqueue, &local->tx_work); } return NETDEV_TX_OK; -- cgit v1.2.3 From 89c7d788f89d58136a2e5596796c298942ee32d6 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 10 Aug 2015 21:15:56 +0200 Subject: mac802154: change frame_retries behaviour This patch changes the default minimum value of frame_retries to 0 and changes the frame_retries default value to 3 which is also 802.15.4 default. We don't use the frame_retries "-1" value as indicator for no-aret mode anymore, instead we checking on the ack request bit inside the 802.15.4 frame control field. This allows a acknowledge handling per frame. This checking is done by transceiver or inside xmit callback of driver layer. If a transceiver doesn't support ARET handling the transmit functionality ignores ack frames then, which isn't well but should not effect anything of current functionality. Reviewed-by: Stefan Schmidt Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- net/mac802154/iface.c | 3 +-- net/mac802154/main.c | 9 +++------ 2 files changed, 4 insertions(+), 8 deletions(-) (limited to 'net/mac802154/main.c') diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c index ff99055631f9..ed26952f9e14 100644 --- a/net/mac802154/iface.c +++ b/net/mac802154/iface.c @@ -498,8 +498,7 @@ ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, wpan_dev->min_be = 3; wpan_dev->max_be = 5; wpan_dev->csma_retries = 4; - /* for compatibility, actual default is 3 */ - wpan_dev->frame_retries = -1; + wpan_dev->frame_retries = 3; wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); diff --git a/net/mac802154/main.c b/net/mac802154/main.c index 9e55431b9a5c..e8cab5bb80c6 100644 --- a/net/mac802154/main.c +++ b/net/mac802154/main.c @@ -111,7 +111,7 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) phy->supported.max_minbe = 8; phy->supported.min_maxbe = 3; phy->supported.max_maxbe = 8; - phy->supported.min_frame_retries = -1; + phy->supported.min_frame_retries = 0; phy->supported.max_frame_retries = 7; phy->supported.max_csma_backoffs = 5; phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE; @@ -177,11 +177,8 @@ int ieee802154_register_hw(struct ieee802154_hw *hw) } if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) { - /* TODO should be 3, but our default value is -1 which means - * no ARET handling. - */ - local->phy->supported.min_frame_retries = -1; - local->phy->supported.max_frame_retries = -1; + local->phy->supported.min_frame_retries = 3; + local->phy->supported.max_frame_retries = 3; } if (hw->flags & IEEE802154_HW_PROMISCUOUS) -- cgit v1.2.3