linux-kernel - RE: [PATCH 3.11 005/137] iwlwifi: dvm: don't enable CTS to self

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Message-ID: <0BA3FCBA62E2DC44AF3030971E174FB31B277EB2@hasmsx107.ger.corp.intel.com>
Date:	Sun, 31 Aug 2014 12:04:19 +0000
From:	"Grumbach, Emmanuel" <emmanuel.grumbach@...el.com>
To:	Luis Henriques <luis.henriques@...onical.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"kernel-team@...ts.ubuntu.com" <kernel-team@...ts.ubuntu.com>
CC:	"Coelho, Luciano" <luciano.coelho@...el.com>
Subject: RE: [PATCH 3.11 005/137] iwlwifi: dvm: don't enable CTS to self

> -----Original Message-----
> From: Luis Henriques [mailto:luis.henriques@...onical.com]
> Sent: Monday, August 18, 2014 12:31 PM
> To: linux-kernel@...r.kernel.org; stable@...r.kernel.org; kernel-
> team@...ts.ubuntu.com
> Cc: Grumbach, Emmanuel; Luis Henriques
> Subject: [PATCH 3.11 005/137] iwlwifi: dvm: don't enable CTS to self
> 
> 3.11.10.15 -stable review patch.  If anyone has any objections, please let me
> know.

Just came back from a long travel - please drop this one. It has caused trouble to people.
I need to revert it.

> 
> ------------------
> 
> From: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
> 
> commit 43d826ca5979927131685cc2092c7ce862cb91cd upstream.
> 
> We should always prefer to use full RTS protection. Using CTS to self gives a
> meaningless improvement, but this flow is much harder for the firmware
> which is likely to have issues with it.
> 
> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
> Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
> ---
>  drivers/net/wireless/iwlwifi/dvm/rxon.c | 12 ------------
>  1 file changed, 12 deletions(-)
> 
> diff --git a/drivers/net/wireless/iwlwifi/dvm/rxon.c
> b/drivers/net/wireless/iwlwifi/dvm/rxon.c
> index cd1ad0019185..ca17e4c9eca2 100644
> --- a/drivers/net/wireless/iwlwifi/dvm/rxon.c
> +++ b/drivers/net/wireless/iwlwifi/dvm/rxon.c
> @@ -1072,13 +1072,6 @@ int iwlagn_commit_rxon(struct iwl_priv *priv,
> struct iwl_rxon_context *ctx)
>  	/* recalculate basic rates */
>  	iwl_calc_basic_rates(priv, ctx);
> 
> -	/*
> -	 * force CTS-to-self frames protection if RTS-CTS is not preferred
> -	 * one aggregation protection method
> -	 */
> -	if (!priv->hw_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; @@ -
> 1484,11 +1477,6 @@ 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 ||
> --
> 1.9.1

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