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rt2x00: Allow tx duplication for legacy rates in HT40 mode

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Make use of the IEEE80211_TX_RC_DUP_DATA flag to duplicate a
transmission with legacy rates to both 20Mhz channels if set.
Also update the related comment in rt2800.h to describe the
behavior of the BW_40 flag for legacy rates.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Helmut Schaa 2010-10-02 11:29:59 +02:00 committed by John W. Linville
parent 95192339c2
commit cb753b7253
2 changed files with 9 additions and 2 deletions
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3
drivers/net/wireless/rt2x00/rt2800.h
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@ -1982,7 +1982,8 @@ struct mac_iveiv_entry {
* FRAG: 1 To inform TKIP engine this is a fragment.
* MIMO_PS: The remote peer is in dynamic MIMO-PS mode
* TX_OP: 0:HT TXOP rule , 1:PIFS TX ,2:Backoff, 3:sifs
* BW: Channel bandwidth 20MHz or 40 MHz
* BW: Channel bandwidth 0:20MHz, 1:40 MHz (for legacy rates this will
* duplicate the frame to both channels).
* STBC: 1: STBC support MCS =0-7, 2,3 : RESERVED
* AMPDU: 1: this frame is eligible for AMPDU aggregation, the hw will
* aggregate consecutive frames with the same RA and QoS TID.

8
drivers/net/wireless/rt2x00/rt2x00ht.c
View file

@ -85,7 +85,13 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
txdesc->rate_mode = RATE_MODE_HT_MIX;
if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
txdesc->rate_mode = RATE_MODE_HT_GREENFIELD;
if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
/*
* Set 40Mhz mode if necessary (for legacy rates this will
* duplicate the frame to both channels).
*/
if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH ||
txrate->flags & IEEE80211_TX_RC_DUP_DATA)
__set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags);
if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
__set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags);