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ath9k: Use minstrel rate control by default 

commit 5efac94999ff218e0101f67a059e44abb4b0b523 upstream.

The ath9k rate control algorithm has various architectural
issues that make it a poor fit in scenarios like congested
environments etc.

An example: https://bugzilla.redhat.com/show_bug.cgi?id=927191

Change the default to minstrel which is more robust in such cases.
The ath9k RC code is left in the driver for now, maybe it can
be removed altogether later on.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sujith Manoharan 2013-06-06 10:06:29 +05:30 committed by Greg Kroah-Hartman
parent 75b780e57b
commit 91c9306746
4 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/wireless/ath/ath9k/Kconfig
View File

@ -89,13 +89,17 @@ config ATH9K_MAC_DEBUG
This option enables collection of statistics for Rx/Tx status
data and some other MAC related statistics
config ATH9K_RATE_CONTROL
config ATH9K_LEGACY_RATE_CONTROL
bool "Atheros ath9k rate control"
depends on ATH9K
default y
default n
---help---
Say Y, if you want to use the ath9k specific rate control
module instead of minstrel_ht.
module instead of minstrel_ht. Be warned that there are various
issues with the ath9k RC and minstrel is a more robust algorithm.
Note that even if this option is selected, "ath9k_rate_control"
has to be passed to mac80211 using the module parameter,
ieee80211_default_rc_algo.
config ATH9K_HTC
tristate "Atheros HTC based wireless cards support"

2
drivers/net/wireless/ath/ath9k/Makefile
View File

@ -6,7 +6,7 @@ ath9k-y += beacon.o \
xmit.o
ath9k-$(CONFIG_ATH9K_BTCOEX_SUPPORT) += mci.o
ath9k-$(CONFIG_ATH9K_RATE_CONTROL) += rc.o
ath9k-$(CONFIG_ATH9K_LEGACY_RATE_CONTROL) += rc.o
ath9k-$(CONFIG_ATH9K_PCI) += pci.o
ath9k-$(CONFIG_ATH9K_AHB) += ahb.o
ath9k-$(CONFIG_ATH9K_DEBUGFS) += debug.o

4
drivers/net/wireless/ath/ath9k/init.c
View File

@ -694,10 +694,6 @@ void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
sc->ant_rx = hw->wiphy->available_antennas_rx;
sc->ant_tx = hw->wiphy->available_antennas_tx;
#ifdef CONFIG_ATH9K_RATE_CONTROL
hw->rate_control_algorithm = "ath9k_rate_control";
#endif
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&sc->sbands[IEEE80211_BAND_2GHZ];

2
drivers/net/wireless/ath/ath9k/rc.h
View File

@ -219,7 +219,7 @@ struct ath_rate_priv {
struct ath_rc_stats rcstats[RATE_TABLE_SIZE];
};
#ifdef CONFIG_ATH9K_RATE_CONTROL
#ifdef CONFIG_ATH9K_LEGACY_RATE_CONTROL
int ath_rate_control_register(void);
void ath_rate_control_unregister(void);
#else