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ath5k: use fixed antenna for tx descriptors 

when using a fixed antenna we should use the antenna number in all tx
descriptors, otherwise the hardware will sometimes send the frame out on the
other antenna. it seems like the hardware does not always respect the default
antenna and diversity settings (esp.  AR5K_STA_ID1_DEFAULT_ANTENNA).

also i would like to note that antenna diversity does not always work correctly
on 5414 (at least) when only one antenna is connected: for example all frames
might be received on antenna A but still the HW tries to send on antenna B some
times, causing packet loss.

this is both verified with the antenna statistics output of the previous patch
and a spectrum analyzer.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf 2010-03-09 16:55:23 +09:00 committed by John W. Linville
parent 8e59340e4f
commit 8bd8beab49
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/ath/ath5k/phy.c
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@ -1873,7 +1873,7 @@ ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
break;
case AR5K_ANTMODE_FIXED_A:
def_ant = 1;
tx_ant = 0;
tx_ant = 1;
use_def_for_tx = true;
update_def_on_tx = false;
use_def_for_rts = true;
@ -1882,7 +1882,7 @@ ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
break;
case AR5K_ANTMODE_FIXED_B:
def_ant = 2;
tx_ant = 0;
tx_ant = 2;
use_def_for_tx = true;
update_def_on_tx = false;
use_def_for_rts = true;