/*
 * 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);
}
dccp?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>dccp</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/dccp/Makefile?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>Makefile</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='09f2ba0b0b7c44ecea49cf69a708203b76ba5535'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</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>Jisheng Zhang &lt;jszhang@marvell.com&gt;</td><td class='right'>2016-11-10 17:21:29 +0800</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-11 15:38:08 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/dccp/Makefile?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>09f2ba0b0b7c44ecea49cf69a708203b76ba5535</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/dccp/Makefile?id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>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=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>042df33ac99f77d8b86ac427431e267c33561c35</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/dccp/Makefile?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>net/dccp/Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/dccp/Makefile?h=nds-private-remove&amp;id=1001354ca34179f3db924eb66672442a173147dc'>1001354ca34179f3db924eb66672442a173147dc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/dccp/Makefile?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535&amp;id2=1001354ca34179f3db924eb66672442a173147dc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: gpio: properly check return value of of_get_named_gpio</div><div class='commit-msg'>The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER
-EINVAL and so on. Currently, for the optional property "enable-gpio",
we only check -EPROBE_DEFER, this is not enough since there may be
misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return
-EINVAL in this case, we should return immediately here. And for the
optional property "gpios", we didn't check the return value, the driver
will continue to the point where gpio_request_array() is called, it
doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here.

This patch tries to address these two issues by properly checking the
return value of of_get_named_gpio.

Signed-off-by: Jisheng Zhang &lt;jszhang@marvell.com&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=09f2ba0b0b7c44ecea49cf69a708203b76ba5535'>Diffstat</a> (limited to 'net/dccp/Makefile')</div><table summary='diffstat' class='diffstat'>