iwlwifi: mvm: set different pm_timeout for action frames

When building a Tx Command for management frames, we are lacking
a check for action frames, for which we should set a different
pm_timeout.  This cause the fw to stay awake for 100TU after each
such frame is transmitted, resulting an excessive power consumption.

Signed-off-by: Avri Altman <avri.altman@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
index 81c4ea3..853698a 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
@@ -124,6 +124,18 @@ enum iwl_tx_flags {
        TX_CMD_FLG_HCCA_CHUNK           = BIT(31)
 }; /* TX_FLAGS_BITS_API_S_VER_1 */
 
+/**
+ * enum iwl_tx_pm_timeouts - pm timeout values in TX command
+ * @PM_FRAME_NONE: no need to suspend sleep mode
+ * @PM_FRAME_MGMT: fw suspend sleep mode for 100TU
+ * @PM_FRAME_ASSOC: fw suspend sleep mode for 10sec
+ */
+enum iwl_tx_pm_timeouts {
+       PM_FRAME_NONE           = 0,
+       PM_FRAME_MGMT           = 2,
+       PM_FRAME_ASSOC          = 3,
+};
+
 /*
  * TX command security control
  */

diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c
index 15bf36a..6df5aad 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/tx.c
@@ -153,18 +153,20 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 
        if (ieee80211_is_mgmt(fc)) {
                if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
-                       tx_cmd->pm_frame_timeout = cpu_to_le16(3);
+                       tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
+               else if (ieee80211_is_action(fc))
+                       tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
                else
-                       tx_cmd->pm_frame_timeout = cpu_to_le16(2);
+                       tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 
                /* The spec allows Action frames in A-MPDU, we don't support
                 * it
                 */
                WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
        } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
-               tx_cmd->pm_frame_timeout = cpu_to_le16(2);
+               tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
        } else {
-               tx_cmd->pm_frame_timeout = 0;
+               tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
        }
 
        if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&