mac80211: minstrels: spare numerous useless calls to get_random_bytes

[deliverable/linux.git] / net / mac80211 / rc80211_minstrel.c

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 7fa1b36e620247ed5c14e97d54b2d72d7a0b43cb..d2f19f7e7091b6e6b9111702f19b02f612fdb52c 100644 (file)
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -422,10 +422,9 @@ init_sample_table(struct minstrel_sta_info *mi)
        memset(mi->sample_table, 0xff, SAMPLE_COLUMNS * mi->n_rates);
 
        for (col = 0; col < SAMPLE_COLUMNS; col++) {
+               prandom_bytes(rnd, sizeof(rnd));
                for (i = 0; i < mi->n_rates; i++) {
-                       get_random_bytes(rnd, sizeof(rnd));
                        new_idx = (i + rnd[i & 7]) % mi->n_rates;
-
                        while (SAMPLE_TBL(mi, new_idx, col) != 0xff)
                                new_idx = (new_idx + 1) % mi->n_rates;