diff options
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 3 | ||||
| -rw-r--r-- | net/mac80211/key.c | 19 | ||||
| -rw-r--r-- | net/mac80211/tx.c | 7 |
3 files changed, 21 insertions, 8 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 8d6d6e3d95da..9e3b4f0f31bd 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -766,6 +766,9 @@ struct ieee80211_local { int tx_headroom; /* required headroom for hardware/radiotap */ + /* count for keys needing tailroom space allocation */ + int crypto_tx_tailroom_needed_cnt; + /* Tasklet and skb queue to process calls from IRQ mode. All frames * added to skb_queue will be processed, but frames in * skb_queue_unreliable may be dropped if the total length of these diff --git a/net/mac80211/key.c b/net/mac80211/key.c index af3c56482c80..ca3c626b011a 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -101,6 +101,10 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) if (!ret) { key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; + + if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) + key->local->crypto_tx_tailroom_needed_cnt--; + return 0; } @@ -156,6 +160,9 @@ static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; + + if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) + key->local->crypto_tx_tailroom_needed_cnt++; } void ieee80211_key_removed(struct ieee80211_key_conf *key_conf) @@ -388,8 +395,10 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key) ieee80211_aes_key_free(key->u.ccmp.tfm); if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC) ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); - if (key->local) + if (key->local) { ieee80211_debugfs_key_remove(key); + key->local->crypto_tx_tailroom_needed_cnt--; + } kfree(key); } @@ -451,6 +460,8 @@ int ieee80211_key_link(struct ieee80211_key *key, ieee80211_debugfs_key_add(key); + key->local->crypto_tx_tailroom_needed_cnt++; + ret = ieee80211_key_enable_hw_accel(key); mutex_unlock(&sdata->local->key_mtx); @@ -492,8 +503,12 @@ void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) mutex_lock(&sdata->local->key_mtx); - list_for_each_entry(key, &sdata->key_list, list) + sdata->local->crypto_tx_tailroom_needed_cnt = 0; + + list_for_each_entry(key, &sdata->key_list, list) { + sdata->local->crypto_tx_tailroom_needed_cnt++; ieee80211_key_enable_hw_accel(key); + } mutex_unlock(&sdata->local->key_mtx); } diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a2043e405493..e3e3aa173af0 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1476,12 +1476,7 @@ static int ieee80211_skb_resize(struct ieee80211_local *local, { int tail_need = 0; - /* - * This could be optimised, devices that do full hardware - * crypto (including TKIP MMIC) need no tailroom... But we - * have no drivers for such devices currently. - */ - if (may_encrypt) { + if (may_encrypt && local->crypto_tx_tailroom_needed_cnt) { tail_need = IEEE80211_ENCRYPT_TAILROOM; tail_need -= skb_tailroom(skb); tail_need = max_t(int, tail_need, 0); |