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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
PJensen · Feb 19, 2010 · b8afe64 · b8afe64
1 parent 88af182
commit b8afe64
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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)