ath9k_hw: use standard SIFS time as reference for half/quarter channels
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 72c5bcd..a43934f 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1041,6 +1041,11 @@
rx_lat = 37;
tx_lat = 54;
+ if (IS_CHAN_5GHZ(chan))
+ sifstime = 16;
+ else
+ sifstime = 10;
+
if (IS_CHAN_HALF_RATE(chan)) {
eifs = 175;
rx_lat *= 2;
@@ -1048,8 +1053,8 @@
if (IS_CHAN_A_FAST_CLOCK(ah, chan))
tx_lat += 11;
+ sifstime *= 2;
slottime = 13;
- sifstime = 32;
} else if (IS_CHAN_QUARTER_RATE(chan)) {
eifs = 340;
rx_lat = (rx_lat * 4) - 1;
@@ -1057,8 +1062,8 @@
if (IS_CHAN_A_FAST_CLOCK(ah, chan))
tx_lat += 22;
+ sifstime *= 4;
slottime = 21;
- sifstime = 64;
} else {
if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) {
eifs = AR_D_GBL_IFS_EIFS_ASYNC_FIFO;
@@ -1072,10 +1077,6 @@
tx_lat = MS(reg, AR_USEC_TX_LAT);
slottime = ah->slottime;
- if (IS_CHAN_5GHZ(chan))
- sifstime = 16;
- else
- sifstime = 10;
}
/* As defined by IEEE 802.11-2007 17.3.8.6 */