iwlwifi: Bug fix, CCMP with HW encryption with AGG

This patch fixes a bug in security. Enables CCMP HW encryption with
aggregations.

Signed-off-by: Max Stepanov <max.stepanov@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
index 35f592dc40c6..1025ffeb8fa8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
@@ -1045,6 +1045,10 @@ struct iwl4965_rx_mpdu_res_start {
  * MAC header) to DWORD boundary. */
 #define TX_CMD_FLG_MH_PAD_MSK __constant_cpu_to_le32(1 << 20)
 
+/* accelerate aggregation support
+ * 0 - no CCMP encryption; 1 - CCMP encryption */
+#define TX_CMD_FLG_AGG_CCMP_MSK __constant_cpu_to_le32(1 << 22)
+
 /* HCCA-AP - disable duration overwriting. */
 #define TX_CMD_FLG_DUR_MSK __constant_cpu_to_le32(1 << 25)
 
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 0b7335181719..d0cb36b9efe3 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -2427,6 +2427,8 @@ static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
         case ALG_CCMP:
                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
+                if (ctl->flags & IEEE80211_TXCTL_AMPDU)
+                        cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
                 break;