hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ath9k_hw: force rx chainmask to 7 on AR9100 

Most AR9100 devices already have a chainmask of 7 (three antennas), however
on the ones that don't (rx and tx chainmask set to 5), problems with IQ
mismatch calibration have been observed.
This shows up as tx queue hangs (and subsequent hardware resets) if traffic
is sent during this type of calibration.
Forcing the rx chainmask to 7 fixes the calibration issues with no apparent
negative side effects on throughput and stability.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-03-19 13:55:42 +01:00 committed by John W. Linville
parent f171760c55
commit 598cdd5246
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -1869,6 +1869,8 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
!(AR_SREV_9271(ah)))
/* CB71: GPIO 0 is pulled down to indicate 3 rx chains */
pCap->rx_chainmask = ath9k_hw_gpio_get(ah, 0) ? 0x5 : 0x7;
else if (AR_SREV_9100(ah))
pCap->rx_chainmask = 0x7;
else
/* Use rx_chainmask from EEPROM. */
pCap->rx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_RX_MASK);