param: simple locking for sysfs-writable charp parameters

[net-next-2.6.git] / net / mac80211 / rate.c

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 6d0bd198af19d949841eaa94489c301e75f4cfa8..be04d46110fe8cdccc5e07eb810b67ee39c5c20f 100644 (file)
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -103,6 +103,7 @@ ieee80211_rate_control_ops_get(const char *name)
        struct rate_control_ops *ops;
        const char *alg_name;
 
+       kparam_block_sysfs_write(ieee80211_default_rc_algo);
        if (!name)
                alg_name = ieee80211_default_rc_algo;
        else
@@ -120,6 +121,7 @@ ieee80211_rate_control_ops_get(const char *name)
        /* try built-in one if specific alg requested but not found */
        if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
                ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
+       kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
 
        return ops;
 }