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Commit b8afe641 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by David S. Miller
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net-sysfs: Use rtnl_trylock in wireless sysfs methods. 



The wireless sysfs methods like the rest of the networking sysfs
methods are removed with the rtnl_lock held and block until
the existing methods stop executing.  So use rtnl_trylock
and restart_syscall so that the code continues to work.

Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 88af182e

net/core/net-sysfs.c

+2 −1
Original line number Diff line number Diff line
@@ -410,7 +410,8 @@ static ssize_t wireless_show(struct device *d, char *buf, 
	const struct iw_statistics *iw;

	ssize_t ret = -EINVAL;



	rtnl_lock();

	if (!rtnl_trylock())

		return restart_syscall();

	if (dev_isalive(dev)) {

		iw = get_wireless_stats(dev);

		if (iw)