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Commit cb753b72 authored Oct 02, 2010 by Helmut Schaa Committed by John W. Linville Oct 05, 2010

rt2x00: Allow tx duplication for legacy rates in HT40 mode



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>

parent 95192339

drivers/net/wireless/rt2x00/rt2800.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -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.

drivers/net/wireless/rt2x00/rt2x00ht.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -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);