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net: Avoid race between network down and sysfs

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Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2009-02-26 06:49:24 +00:00 committed by David S. Miller
parent 07555c9880
commit 5a5990d309
1 changed files with 3 additions and 1 deletions
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4
net/core/net-sysfs.c
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@ -77,7 +77,9 @@ static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
if (endp == buf) if (endp == buf)
goto err; goto err;
rtnl_lock(); if (!rtnl_trylock())
return -ERESTARTSYS;
if (dev_isalive(net)) { if (dev_isalive(net)) {
if ((ret = (*set)(net, new)) == 0) if ((ret = (*set)(net, new)) == 0)
ret = len; ret = len;