From b8afe6416101549e877f8470f2a160df69676166 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 19 Feb 2010 13:23:47 +0000 Subject: 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: Eric W. Biederman Signed-off-by: David S. Miller --- net/core/net-sysfs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index fbc1c7472c5e..099c753c4213 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -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) -- cgit v1.2.3