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iwlwifi: make U-APSD default configurable at compile time

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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 <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg 2014-09-01 11:28:11 +02:00 committed by Emmanuel Grumbach
parent 32be1a83af
commit d6ca18de12
2 changed files with 17 additions and 1 deletions
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10
drivers/net/wireless/iwlwifi/Kconfig
View File

@ -87,6 +87,16 @@ 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"
config IWLWIFI_DEBUG

8
drivers/net/wireless/iwlwifi/iwl-drv.c
View File

@ -1254,7 +1254,9 @@ 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);
@ -1370,7 +1372,11 @@ 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