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rt2x00: Fix SM PS check

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Fix a check for dynamic SM PS mode in the STAs HT caps. Since a
value of 3 means "SM PS disabled" the previous check assumed in
that case that "dynamic SM PS" was enabled and as such prefixed
every MCS>7 frame with a unnecessary RTS/CTS exchange. Also,
the bit shift was done in the wrong direction.

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 11:28:02 +02:00 committed by John W. Linville
parent 96c3da7d7d
commit a13ac9df0a
1 changed files with 4 additions and 3 deletions
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7
drivers/net/wireless/rt2x00/rt2x00ht.c
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@ -60,9 +60,10 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
* when using more then one tx stream (>MCS7). * when using more then one tx stream (>MCS7).
*/ */
if (tx_info->control.sta && txdesc->mcs > 7 && if (tx_info->control.sta && txdesc->mcs > 7 &&
(tx_info->control.sta->ht_cap.cap & ((tx_info->control.sta->ht_cap.cap &
(WLAN_HT_CAP_SM_PS_DYNAMIC << IEEE80211_HT_CAP_SM_PS) >>
IEEE80211_HT_CAP_SM_PS_SHIFT))) IEEE80211_HT_CAP_SM_PS_SHIFT) ==
WLAN_HT_CAP_SM_PS_DYNAMIC)
__set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags); __set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags);
} else { } else {
txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs); txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs);