Revert "iwlwifi: dvm: don't enable CTS to self"

commit f47f46d7b09cf1d09e4b44b6cc4dd7d68a08028c upstream.

This reverts commit 43d826ca5979927131685cc2092c7ce862cb91cd.

This commit caused packet loss.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[bwh: Backported to 3.2:
 - Adjust filename
 - Condition for RXON_FLG_SELF_CTS_EN in iwlagn_commit_rxon() was different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
index d696536..d552fa3 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
@@ -440,6 +440,14 @@ int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
        /* always get timestamp with Rx frame */
        ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 
+       /*
+        * force CTS-to-self frames protection if RTS-CTS is not preferred
+        * one aggregation protection method
+        */
+       if (!(priv->cfg->ht_params &&
+             priv->cfg->ht_params->use_rts_for_aggregation))
+               ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
+
        if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
            !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
                ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
@@ -872,6 +880,11 @@ void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
        else
                ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
 
+       if (bss_conf->use_cts_prot)
+               ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
+       else
+               ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
+
        memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
 
        if (vif->type == NL80211_IFTYPE_AP ||