iwlegacy: move wep_keys out of context

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 36 insertions, 22 deletions

diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c
index ecb7b542b96c..35d868c4ba92 100644
--- a/drivers/net/wireless/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/iwlegacy/4965-mac.c
@@ -2808,7 +2808,7 @@ static int
 il4965_static_wepkey_cmd(struct il_priv *il, struct il_rxon_context *ctx,
                          bool send_if_empty)
 {
-        int i, not_empty = 0;
+        int i;
         u8 buff[sizeof(struct il_wep_cmd) +
                 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
         struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
@@ -2818,6 +2818,7 @@ il4965_static_wepkey_cmd(struct il_priv *il, struct il_rxon_context *ctx,
                 .data = wep_cmd,
                 .flags = CMD_SYNC,
         };
+        bool not_empty = false;
 
         might_sleep();
 
@@ -2825,24 +2826,23 @@ il4965_static_wepkey_cmd(struct il_priv *il, struct il_rxon_context *ctx,
                cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
 
         for (i = 0; i < WEP_KEYS_MAX; i++) {
+                u8 key_size = il->_4965.wep_keys[i].key_size;
+
                 wep_cmd->key[i].key_idx = i;
-                if (ctx->wep_keys[i].key_size) {
+                if (key_size) {
                         wep_cmd->key[i].key_offset = i;
-                        not_empty = 1;
-                } else {
+                        not_empty = true;
+                } else
                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
-                }
 
-                wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
-                memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
-                       ctx->wep_keys[i].key_size);
+                wep_cmd->key[i].key_size = key_size;
+                memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
         }
 
         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
         wep_cmd->num_keys = WEP_KEYS_MAX;
 
         cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
-
         cmd.len = cmd_size;
 
         if (not_empty || send_if_empty)
@@ -2864,19 +2864,20 @@ il4965_remove_default_wep_key(struct il_priv *il, struct il_rxon_context *ctx,
                               struct ieee80211_key_conf *keyconf)
 {
         int ret;
+        int idx = keyconf->keyidx;
 
         lockdep_assert_held(&il->mutex);
 
-        D_WEP("Removing default WEP key: idx=%d\n", keyconf->keyidx);
+        D_WEP("Removing default WEP key: idx=%d\n", idx);
 
-        memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
+        memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
         if (il_is_rfkill(il)) {
                 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
                 /* but keys in device are clear anyway so return success */
                 return 0;
         }
         ret = il4965_static_wepkey_cmd(il, ctx, 1);
-        D_WEP("Remove default WEP key: idx=%d ret=%d\n", keyconf->keyidx, ret);
+        D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
 
         return ret;
 }
@@ -2886,11 +2887,12 @@ il4965_set_default_wep_key(struct il_priv *il, struct il_rxon_context *ctx,
                            struct ieee80211_key_conf *keyconf)
 {
         int ret;
+        int len = keyconf->keylen;
+        int idx = keyconf->keyidx;
 
         lockdep_assert_held(&il->mutex);
 
-        if (keyconf->keylen != WEP_KEY_LEN_128 &&
-            keyconf->keylen != WEP_KEY_LEN_64) {
+        if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
                 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
                 return -EINVAL;
         }
@@ -2899,14 +2901,12 @@ il4965_set_default_wep_key(struct il_priv *il, struct il_rxon_context *ctx,
         keyconf->hw_key_idx = HW_KEY_DEFAULT;
         il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
 
-        ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
-        memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
-               keyconf->keylen);
+        il->_4965.wep_keys[idx].key_size = len;
+        memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
 
         ret = il4965_static_wepkey_cmd(il, ctx, false);
-        D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", keyconf->keylen,
-              keyconf->keyidx, ret);
 
+        D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
         return ret;
 }
 
@@ -3106,7 +3106,7 @@ il4965_remove_dynamic_key(struct il_priv *il, struct il_rxon_context *ctx,
 
         lockdep_assert_held(&il->mutex);
 
-        ctx->key_mapping_keys--;
+        il->_4965.key_mapping_keys--;
 
         spin_lock_irqsave(&il->sta_lock, flags);
         key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
@@ -3164,7 +3164,7 @@ il4965_set_dynamic_key(struct il_priv *il, struct il_rxon_context *ctx,
 
         lockdep_assert_held(&il->mutex);
 
-        ctx->key_mapping_keys++;
+        il->_4965.key_mapping_keys++;
         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 
         switch (keyconf->cipher) {
@@ -5067,6 +5067,20 @@ __il4965_down(struct il_priv *il)
         del_timer_sync(&il->watchdog);
 
         il_clear_ucode_stations(il, NULL);
+
+        /* FIXME: race conditions ? */
+        spin_lock_irq(&il->sta_lock);
+        /*
+         * Remove all key information that is not stored as part
+         * of station information since mac80211 may not have had
+         * a chance to remove all the keys. When device is
+         * reconfigured by mac80211 after an error all keys will
+         * be reconfigured.
+         */
+        memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
+        il->_4965.key_mapping_keys = 0;
+        spin_unlock_irq(&il->sta_lock);
+
         il_dealloc_bcast_stations(il);
         il_clear_driver_stations(il);
 
@@ -5613,7 +5627,7 @@ il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
                 if (cmd == SET_KEY)
-                        is_default_wep_key = !ctx->key_mapping_keys;
+                        is_default_wep_key = !il->_4965.key_mapping_keys;
                 else
                         is_default_wep_key =
                             (key->hw_key_idx == HW_KEY_DEFAULT);