iwlwifi: fix queue flush confusion

The flush_control parameter to iwlagn_txfifo_flush
is passed as an internal value (context flags) and
then sent to the device, that can't be right.

Fix the confusion by removing the parameter, always
use IWL_DROP_ALL that is redefined according to the
firmware API in the flush control.

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

6 files changed, 20 insertions, 22 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/agn.h b/drivers/net/wireless/iwlwifi/dvm/agn.h
index 75e12f29d9eb..33b3ad2e546b 100644
--- a/drivers/net/wireless/iwlwifi/dvm/agn.h
+++ b/drivers/net/wireless/iwlwifi/dvm/agn.h
@@ -176,8 +176,8 @@ int iwlagn_hw_valid_rtc_data_addr(u32 addr);
 /* lib */
 int iwlagn_send_tx_power(struct iwl_priv *priv);
 void iwlagn_temperature(struct iwl_priv *priv);
-int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control);
-void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control);
+int iwlagn_txfifo_flush(struct iwl_priv *priv);
+void iwlagn_dev_txfifo_flush(struct iwl_priv *priv);
 int iwlagn_send_beacon_cmd(struct iwl_priv *priv);
 int iwl_send_statistics_request(struct iwl_priv *priv,
                                 u8 flags, bool clear);
diff --git a/drivers/net/wireless/iwlwifi/dvm/commands.h b/drivers/net/wireless/iwlwifi/dvm/commands.h
index ac24861f04ad..71ab76b2b39d 100644
--- a/drivers/net/wireless/iwlwifi/dvm/commands.h
+++ b/drivers/net/wireless/iwlwifi/dvm/commands.h
@@ -986,8 +986,7 @@ struct iwl_rem_sta_cmd {
 
 #define IWL_AGG_TX_QUEUE_MSK            cpu_to_le32(0xffc00)
 
-#define IWL_DROP_SINGLE         0
-#define IWL_DROP_ALL            (BIT(IWL_RXON_CTX_BSS) | BIT(IWL_RXON_CTX_PAN))
+#define IWL_DROP_ALL                    BIT(1)
 
 /*
  * REPLY_TXFIFO_FLUSH = 0x1e(command and response)
diff --git a/drivers/net/wireless/iwlwifi/dvm/debugfs.c b/drivers/net/wireless/iwlwifi/dvm/debugfs.c
index 1a98fa3ab06d..769a08bca86f 100644
--- a/drivers/net/wireless/iwlwifi/dvm/debugfs.c
+++ b/drivers/net/wireless/iwlwifi/dvm/debugfs.c
@@ -2101,7 +2101,7 @@ static ssize_t iwl_dbgfs_txfifo_flush_write(struct file *file,
         if (iwl_is_rfkill(priv))
                 return -EFAULT;
 
-        iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
+        iwlagn_dev_txfifo_flush(priv);
 
         return count;
 }
diff --git a/drivers/net/wireless/iwlwifi/dvm/lib.c b/drivers/net/wireless/iwlwifi/dvm/lib.c
index 01ff55faf2ab..7e59be4b89b8 100644
--- a/drivers/net/wireless/iwlwifi/dvm/lib.c
+++ b/drivers/net/wireless/iwlwifi/dvm/lib.c
@@ -136,7 +136,7 @@ int iwlagn_manage_ibss_station(struct iwl_priv *priv,
  *  1. acquire mutex before calling
  *  2. make sure rf is on and not in exit state
  */
-int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
+int iwlagn_txfifo_flush(struct iwl_priv *priv)
 {
         struct iwl_txfifo_flush_cmd flush_cmd;
         struct iwl_host_cmd cmd = {
@@ -146,35 +146,34 @@ int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
                 .data = { &flush_cmd, },
         };
 
-        might_sleep();
-
         memset(&flush_cmd, 0, sizeof(flush_cmd));
-        if (flush_control & BIT(IWL_RXON_CTX_BSS))
-                flush_cmd.queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
-                                 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
-                                 IWL_SCD_MGMT_MSK;
-        if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
-            (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
+
+        flush_cmd.queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
+                                  IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
+                                  IWL_SCD_MGMT_MSK;
+        if ((priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
                 flush_cmd.queue_control |= IWL_PAN_SCD_VO_MSK |
-                                IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
-                                IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
-                                IWL_PAN_SCD_MULTICAST_MSK;
+                                           IWL_PAN_SCD_VI_MSK |
+                                           IWL_PAN_SCD_BE_MSK |
+                                           IWL_PAN_SCD_BK_MSK |
+                                           IWL_PAN_SCD_MGMT_MSK |
+                                           IWL_PAN_SCD_MULTICAST_MSK;
 
         if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)
                 flush_cmd.queue_control |= IWL_AGG_TX_QUEUE_MSK;
 
         IWL_DEBUG_INFO(priv, "queue control: 0x%x\n",
                        flush_cmd.queue_control);
-        flush_cmd.flush_control = cpu_to_le16(flush_control);
+        flush_cmd.flush_control = cpu_to_le16(IWL_DROP_ALL);
 
         return iwl_dvm_send_cmd(priv, &cmd);
 }
 
-void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
+void iwlagn_dev_txfifo_flush(struct iwl_priv *priv)
 {
         mutex_lock(&priv->mutex);
         ieee80211_stop_queues(priv->hw);
-        if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
+        if (iwlagn_txfifo_flush(priv)) {
                 IWL_ERR(priv, "flush request fail\n");
                 goto done;
         }
diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
index 46b0d1c46529..cb443d54f9b9 100644
--- a/drivers/net/wireless/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -1017,7 +1017,7 @@ static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
          */
         if (drop) {
                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
-                if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
+                if (iwlagn_txfifo_flush(priv)) {
                         IWL_ERR(priv, "flush request fail\n");
                         goto done;
                 }
diff --git a/drivers/net/wireless/iwlwifi/dvm/main.c b/drivers/net/wireless/iwlwifi/dvm/main.c
index 4547f36bcc6c..95d348b02846 100644
--- a/drivers/net/wireless/iwlwifi/dvm/main.c
+++ b/drivers/net/wireless/iwlwifi/dvm/main.c
@@ -511,7 +511,7 @@ static void iwl_bg_tx_flush(struct work_struct *work)
                 return;
 
         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
-        iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
+        iwlagn_dev_txfifo_flush(priv);
 }
 
 /*