From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755347AbbALSbJ (ORCPT ); Mon, 12 Jan 2015 13:31:09 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:58447 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755295AbbALSbA (ORCPT ); Mon, 12 Jan 2015 13:31:00 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Johannes Berg , Emmanuel Grumbach , Luis Henriques Subject: [PATCH 3.16.y-ckt 201/216] iwlwifi: make U-APSD default configurable at compile time Date: Mon, 12 Jan 2015 18:29:39 +0000 Message-Id: <1421087394-2712-89-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> References: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg commit d6ca18de129fc4dd4374389561930b32820f35ff upstream. With a significant number of deployed APs, enabling uAPSD leads to the AP never using aggregation sessions (likely due to the complexities involved in handling uAPSD in those.) This obviously results in a large drop in throughput with such APs. On the other hand, uAPSD can result in some power consumption benefits, but for now just disable it to get performance with affected APs back up. Signed-off-by: Johannes Berg Signed-off-by: Emmanuel Grumbach Signed-off-by: Luis Henriques --- drivers/net/wireless/iwlwifi/Kconfig | 10 ++++++++++ drivers/net/wireless/iwlwifi/iwl-drv.c | 8 +++++++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/iwlwifi/Kconfig b/drivers/net/wireless/iwlwifi/Kconfig index 7fd50428b934..9c67e255c689 100644 --- a/drivers/net/wireless/iwlwifi/Kconfig +++ b/drivers/net/wireless/iwlwifi/Kconfig @@ -85,6 +85,16 @@ config IWLWIFI_BCAST_FILTERING If unsure, don't enable this option, as some programs might expect incoming broadcasts for their normal operations. +config IWLWIFI_UAPSD + bool "enable U-APSD by default" + depends on IWLMVM + help + Say Y here to enable U-APSD by default. This may cause + interoperability problems with some APs, manifesting in lower than + expected throughput due to those APs not enabling aggregation + + If unsure, say N. + menu "Debugging Options" depends on IWLWIFI diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c index f2a5c12269a3..a09ce04c0f63 100644 --- a/drivers/net/wireless/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/iwlwifi/iwl-drv.c @@ -1243,7 +1243,9 @@ struct iwl_mod_params iwlwifi_mod_params = { .bt_coex_active = true, .power_level = IWL_POWER_INDEX_1, .wd_disable = true, - .uapsd_disable = false, +#ifndef CONFIG_IWLWIFI_UAPSD + .uapsd_disable = true, +#endif /* CONFIG_IWLWIFI_UAPSD */ /* the rest are 0 by default */ }; IWL_EXPORT_SYMBOL(iwlwifi_mod_params); @@ -1359,7 +1361,11 @@ MODULE_PARM_DESC(nvm_file, "NVM file name"); module_param_named(uapsd_disable, iwlwifi_mod_params.uapsd_disable, bool, S_IRUGO); +#ifdef CONFIG_IWLWIFI_UAPSD MODULE_PARM_DESC(uapsd_disable, "disable U-APSD functionality (default: N)"); +#else +MODULE_PARM_DESC(uapsd_disable, "disable U-APSD functionality (default: Y)"); +#endif /* * set bt_coex_active to true, uCode will do kill/defer -- 2.1.4