iwlagn: refactor iwlagn_mac_channel_switch

Use less indentions and remove uneeded irq-save flags.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 0b2d2cd..099c279 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2916,7 +2916,6 @@ static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
         */
        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
        u16 ch;
-       unsigned long flags = 0;
 
        IWL_DEBUG_MAC80211(priv, "enter\n");
 
@@ -2933,65 +2932,64 @@ static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
        if (!iwl_is_associated_ctx(ctx))
                goto out;
 
-       if (priv->cfg->ops->lib->set_channel_switch) {
+       if (!priv->cfg->ops->lib->set_channel_switch)
+               goto out;
 
-               ch = channel->hw_value;
-               if (le16_to_cpu(ctx->active.channel) != ch) {
-                       ch_info = iwl_get_channel_info(priv,
-                                                      channel->band,
-                                                      ch);
-                       if (!is_channel_valid(ch_info)) {
-                               IWL_DEBUG_MAC80211(priv, "invalid channel\n");
-                               goto out;
-                       }
-                       spin_lock_irqsave(&priv->lock, flags);
-
-                       priv->current_ht_config.smps = conf->smps_mode;
-
-                       /* Configure HT40 channels */
-                       ctx->ht.enabled = conf_is_ht(conf);
-                       if (ctx->ht.enabled) {
-                               if (conf_is_ht40_minus(conf)) {
-                                       ctx->ht.extension_chan_offset =
-                                               IEEE80211_HT_PARAM_CHA_SEC_BELOW;
-                                       ctx->ht.is_40mhz = true;
-                               } else if (conf_is_ht40_plus(conf)) {
-                                       ctx->ht.extension_chan_offset =
-                                               IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
-                                       ctx->ht.is_40mhz = true;
-                               } else {
-                                       ctx->ht.extension_chan_offset =
-                                               IEEE80211_HT_PARAM_CHA_SEC_NONE;
-                                       ctx->ht.is_40mhz = false;
-                               }
-                       } else
-                               ctx->ht.is_40mhz = false;
+       ch = channel->hw_value;
+       if (le16_to_cpu(ctx->active.channel) == ch)
+               goto out;
+
+       ch_info = iwl_get_channel_info(priv, channel->band, ch);
+       if (!is_channel_valid(ch_info)) {
+               IWL_DEBUG_MAC80211(priv, "invalid channel\n");
+               goto out;
+       }
 
-                       if ((le16_to_cpu(ctx->staging.channel) != ch))
-                               ctx->staging.flags = 0;
+       spin_lock_irq(&priv->lock);
 
-                       iwl_set_rxon_channel(priv, channel, ctx);
-                       iwl_set_rxon_ht(priv, ht_conf);
-                       iwl_set_flags_for_band(priv, ctx, channel->band,
-                                              ctx->vif);
-                       spin_unlock_irqrestore(&priv->lock, flags);
+       priv->current_ht_config.smps = conf->smps_mode;
 
-                       iwl_set_rate(priv);
-                       /*
-                        * at this point, staging_rxon has the
-                        * configuration for channel switch
-                        */
-                       set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
-                       priv->switch_channel = cpu_to_le16(ch);
-                       if (priv->cfg->ops->lib->set_channel_switch(priv,
-                                                                   ch_switch)) {
-                               clear_bit(STATUS_CHANNEL_SWITCH_PENDING,
-                                         &priv->status);
-                               priv->switch_channel = 0;
-                               ieee80211_chswitch_done(ctx->vif, false);
-                       }
+       /* Configure HT40 channels */
+       ctx->ht.enabled = conf_is_ht(conf);
+       if (ctx->ht.enabled) {
+               if (conf_is_ht40_minus(conf)) {
+                       ctx->ht.extension_chan_offset =
+                               IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+                       ctx->ht.is_40mhz = true;
+               } else if (conf_is_ht40_plus(conf)) {
+                       ctx->ht.extension_chan_offset =
+                               IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+                       ctx->ht.is_40mhz = true;
+               } else {
+                       ctx->ht.extension_chan_offset =
+                               IEEE80211_HT_PARAM_CHA_SEC_NONE;
+                       ctx->ht.is_40mhz = false;
                }
+       } else
+               ctx->ht.is_40mhz = false;
+
+       if ((le16_to_cpu(ctx->staging.channel) != ch))
+               ctx->staging.flags = 0;
+
+       iwl_set_rxon_channel(priv, channel, ctx);
+       iwl_set_rxon_ht(priv, ht_conf);
+       iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
+
+       spin_unlock_irq(&priv->lock);
+
+       iwl_set_rate(priv);
+       /*
+        * at this point, staging_rxon has the
+        * configuration for channel switch
+        */
+       set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
+       priv->switch_channel = cpu_to_le16(ch);
+       if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
+               clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
+               priv->switch_channel = 0;
+               ieee80211_chswitch_done(ctx->vif, false);
        }
+
 out:
        mutex_unlock(&priv->mutex);
        IWL_DEBUG_MAC80211(priv, "leave\n");