/*
 * Copyright 2007-2012 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Written by:
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Sergey Lapin <slapin@ossfans.org>
 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 */

#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/crc-ccitt.h>
#include <asm/unaligned.h>

#include <net/rtnetlink.h>
#include <net/ieee802154_netdev.h>
#include <net/mac802154.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"
#include "driver-ops.h"

void ieee802154_xmit_worker(struct work_struct *work)
{
	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;

	res = drv_xmit_sync(local, skb);
	if (res)
		goto err_tx;

	ieee802154_xmit_complete(&local->hw, skb, false);

	dev->stats.tx_packets++;
	dev->stats.tx_bytes += skb->len;

	return;

err_tx:
	/* Restart the netif queue on each sub_if_data object. */
	ieee802154_wake_queue(&local->hw);
	kfree_skb(skb);
	netdev_dbg(dev, "transmission failed\n");
}

static netdev_tx_t
ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
{
	struct net_device *dev = skb->dev;
	int ret;

	if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
		u16 crc = crc_ccitt(0, skb->data, skb->len);

		put_unaligned_le16(crc, skb_put(skb, 2));
	}

	/* Stop the netif queue on each sub_if_data object. */
	ieee802154_stop_queue(&local->hw);

	/* async is priority, otherwise sync is fallback */
	if (local->ops->xmit_async) {
		ret = drv_xmit_async(local, skb);
		if (ret) {
			ieee802154_wake_queue(&local->hw);
			goto err_tx;
		}

		dev->stats.tx_packets++;
		dev->stats.tx_bytes += skb->len;
	} else {
		local->tx_skb = skb;
		queue_work(local->workqueue, &local->tx_work);
	}

	return NETDEV_TX_OK;

err_tx:
	kfree_skb(skb);
	return NETDEV_TX_OK;
}

netdev_tx_t
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	skb->skb_iif = dev->ifindex;

	return ieee802154_tx(sdata->local, skb);
}

netdev_tx_t
ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	int rc;

	/* TODO we should move it to wpan_dev_hard_header and dev_hard_header
	 * functions. The reason is wireshark will show a mac header which is
	 * with security fields but the payload is not encrypted.
	 */
	rc = mac802154_llsec_encrypt(&sdata->sec, skb);
	if (rc) {
		netdev_warn(dev, "encryption failed: %i\n", rc);
		kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	skb->skb_iif = dev->ifindex;

	return ieee802154_tx(sdata->local, skb);
}
='/cgit.cgi/linux/net-next.git/log/net/irda?h=nds-private-remove&amp;id=11538d039ac6efcf4f1a6c536e1b87cd3668a9fd'>irda</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/irda/ircomm?h=nds-private-remove&amp;id=11538d039ac6efcf4f1a6c536e1b87cd3668a9fd'>ircomm</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/irda/ircomm/ircomm_tty_ioctl.c?h=nds-private-remove&amp;id=11538d039ac6efcf4f1a6c536e1b87cd3668a9fd'>ircomm_tty_ioctl.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/irda/ircomm/ircomm_tty_ioctl.c?h=nds-private-remove&amp;id=11538d039ac6efcf4f1a6c536e1b87cd3668a9fd&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-07 12:10:57 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-07 12:10:57 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sctp?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>926af6273fc683cd98cd0ce7bf0d04a02eed6742</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sctp?id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>99c40d2bc42563a92c2877e58e32a6b4c922ba30</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sctp?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>net/sctp</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sctp?h=nds-private-remove&amp;id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>b6789123bccba8b5feb9901ed2e8c3c39181979d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sctp?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742&amp;id2=b6789123bccba8b5feb9901ed2e8c3c39181979d'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sctp?h=nds-private-remove&amp;id=912964eacb111551db73429719eb5fadcab0ff8a'>912964eacb111551db73429719eb5fadcab0ff8a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sctp?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742&amp;id2=912964eacb111551db73429719eb5fadcab0ff8a'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</div><div class='commit-msg'>Pull networking fixes from David Miller:

 1) Load correct firmware in rtl8192ce wireless driver, from Jurij
    Smakov.

 2) Fix leak of tx_ring and tx_cq due to overwriting in mlx4 driver,
    from Martin KaFai Lau.

 3) Need to reference count PHY driver module when it is attached, from
    Mao Wenan.

 4) Don't do zero length vzalloc() in ethtool register dump, from
    Stanislaw Gruszka.

 5) Defer net_disable_timestamp() to a workqueue to get out of locking
    issues, from Eric Dumazet.

 6) We cannot drop the SKB dst when IP options refer to them, fix also
    from Eric Dumazet.

 7) Incorrect packet header offset calculations in ip6_gre, again from
    Eric Dumazet.

 8) Missing tcp_v6_restore_cb() causes use-after-free, from Eric too.

 9) tcp_splice_read() can get into an infinite loop with URG, and hey
    it's from Eric once more.

10) vnet_hdr_sz can change asynchronously, so read it once during
    decision making in macvtap and tun, from Willem de Bruijn.

11) Can't use kernel stack for DMA transfers in USB networking drivers,
    from Ben Hutchings.

12) Handle csum errors properly in UDP by calling the proper destructor,
    from Eric Dumazet.

13) For non-deterministic softirq run when scheduling NAPI from a
    workqueue in mlx4, from Benjamin Poirier.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (28 commits)
  sctp: check af before verify address in sctp_addr_id2transport
  sctp: avoid BUG_ON on sctp_wait_for_sndbuf
  mlx4: Invoke softirqs after napi_reschedule
  udp: properly cope with csum errors
  catc: Use heap buffer for memory size test
  catc: Combine failure cleanup code in catc_probe()
  rtl8150: Use heap buffers for all register access
  pegasus: Use heap buffers for all register access
  macvtap: read vnet_hdr_size once
  tun: read vnet_hdr_sz once
  tcp: avoid infinite loop in tcp_splice_read()
  hns: avoid stack overflow with CONFIG_KASAN
  ipv6: Fix IPv6 packet loss in scenarios involving roaming + snooping switches
  ipv6: tcp: add a missing tcp_v6_restore_cb()
  nl80211: Fix mesh HT operation check
  mac80211: Fix adding of mesh vendor IEs
  mac80211: Allocate a sync skcipher explicitly for FILS AEAD
  mac80211: Fix FILS AEAD protection in Association Request frame
  ip6_gre: fix ip6gre_err() invalid reads
  netlabel: out of bound access in cipso_v4_validate()
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>Diffstat</a> (limited to 'net/sctp')</div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/net/sctp/socket.c?h=nds-private-remove&amp;id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>net/sctp/socket.c</a></td><td class='right'>5</td><td class='graph'><table summary='file diffstat' width='5%'><tr><td class='add' style='width: 60.0%;'/><td class='rem' style='width: 40.0%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>1 files changed, 3 insertions, 2 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/net/sctp/socket.c b/net/sctp/socket.c