c730c90316
This patch is similar like d20ef63d32
("mac80211: document ieee80211_rx() context requirement"). The
netif_receive_skb call requires with softirqs disabled. This patch
adds a warning if softirqs are pending while calling ieee802154_rx.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/crc-ccitt.h>
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#include <net/mac802154.h>
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#include <net/ieee802154_netdev.h>
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#include "ieee802154_i.h"
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static void
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mac802154_subif_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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skb->protocol = htons(ETH_P_IEEE802154);
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skb_reset_mac_header(skb);
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if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
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u16 crc;
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if (skb->len < 2) {
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pr_debug("got invalid frame\n");
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goto fail;
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}
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crc = crc_ccitt(0, skb->data, skb->len);
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if (crc) {
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pr_debug("CRC mismatch\n");
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goto fail;
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}
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skb_trim(skb, skb->len - 2); /* CRC */
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}
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mac802154_monitors_rx(local, skb);
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mac802154_wpans_rx(local, skb);
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return;
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fail:
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kfree_skb(skb);
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}
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void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
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{
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WARN_ON_ONCE(softirq_count() == 0);
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mac802154_subif_rx(hw, skb);
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}
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EXPORT_SYMBOL(ieee802154_rx);
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void
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ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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mac_cb(skb)->lqi = lqi;
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skb->pkt_type = IEEE802154_RX_MSG;
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skb_queue_tail(&local->skb_queue, skb);
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tasklet_schedule(&local->tasklet);
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}
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EXPORT_SYMBOL(ieee802154_rx_irqsafe);
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