/*
 *	Network event notifiers
 *
 *	Authors:
 *      Tom Tucker             <tom@opengridcomputing.com>
 *      Steve Wise             <swise@opengridcomputing.com>
 *
 *	This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 *	Fixes:
 */

#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <linux/export.h>
#include <net/netevent.h>

static ATOMIC_NOTIFIER_HEAD(netevent_notif_chain);

/**
 *	register_netevent_notifier - register a netevent notifier block
 *	@nb: notifier
 *
 *	Register a notifier to be called when a netevent occurs.
 *	The notifier passed is linked into the kernel structures and must
 *	not be reused until it has been unregistered. A negative errno code
 *	is returned on a failure.
 */
int register_netevent_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&netevent_notif_chain, nb);
}
EXPORT_SYMBOL_GPL(register_netevent_notifier);

/**
 *	netevent_unregister_notifier - unregister a netevent notifier block
 *	@nb: notifier
 *
 *	Unregister a notifier previously registered by
 *	register_neigh_notifier(). The notifier is unlinked into the
 *	kernel structures and may then be reused. A negative errno code
 *	is returned on a failure.
 */

int unregister_netevent_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&netevent_notif_chain, nb);
}
EXPORT_SYMBOL_GPL(unregister_netevent_notifier);

/**
 *	call_netevent_notifiers - call all netevent notifier blocks
 *      @val: value passed unmodified to notifier function
 *      @v:   pointer passed unmodified to notifier function
 *
 *	Call all neighbour notifier blocks.  Parameters and return value
 *	are as for notifier_call_chain().
 */

int call_netevent_notifiers(unsigned long val, void *v)
{
	return atomic_notifier_call_chain(&netevent_notif_chain, val, v);
}
EXPORT_SYMBOL_GPL(call_netevent_notifiers);
ction='/cgit.cgi/linux/net-next.git/log/'>
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<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/?id=e69e46261063a25c3907bed16a2e9d18b115d1fd'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr class='logheader'><td><span title='2017-02-07 13:48:22 -0500'>2017-02-07</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?id=e69e46261063a25c3907bed16a2e9d18b115d1fd'>net: dsa: Do not clobber PHY link outside of state machine</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-7</span>/<span class='insertions'>+3</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
Calling phy_read_status() means that we may call into
genphy_read_status() which in turn will use genphy_update_link() which
can make changes to phydev-&gt;link outside of the state machine's state
transitions. This is an invalid behavior that is now caught as of
811a919135b9 ("phy state machine: failsafe leave invalid RUNNING state")

Reported-by: Zefir Kurtisi &lt;zefir.kurtisi@neratec.com&gt;
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Reviewed-by: Andrew Lunn &lt;andrew@lunn.ch&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-07 13:48:22 -0500'>2017-02-07</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?id=6136c8fe53a8a28906e090ddd8914f9846eb8df8'>net: netcp: Do not clobber PHY link outside of state machine</a></td><td>Florian Fainelli