mac80211: remove hw.conf.channel usage where possible

Removes hw.conf.channel usage from the following functions:
 * ieee80211_mandatory_rates
 * ieee80211_sta_get_rates
 * ieee80211_frame_duration
 * ieee80211_rts_duration
 * ieee80211_ctstoself_duration

This is in preparation for multi-channel operation.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 11 insertions, 8 deletions

diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index 55ef93dd7438..64a453a6dfe4 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1527,7 +1527,7 @@ void ath5k_eeprom_detach(struct ath5k_hw *ah);
 
 /* Protocol Control Unit Functions */
 /* Helpers */
-int ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
+int ath5k_hw_get_frame_duration(struct ath5k_hw *ah, enum ieee80211_band band,
 		int len, struct ieee80211_rate *rate, bool shortpre);
 unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah);
 unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah);
diff --git a/drivers/net/wireless/ath/ath5k/pcu.c b/drivers/net/wireless/ath/ath5k/pcu.c
index cebfd6fd31d3..1f16b4227d8f 100644
--- a/drivers/net/wireless/ath/ath5k/pcu.c
+++ b/drivers/net/wireless/ath/ath5k/pcu.c
@@ -110,7 +110,7 @@ static const unsigned int ack_rates_high[] =
  * bwmodes.
  */
 int
-ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
+ath5k_hw_get_frame_duration(struct ath5k_hw *ah, enum ieee80211_band band,
 		int len, struct ieee80211_rate *rate, bool shortpre)
 {
 	int sifs, preamble, plcp_bits, sym_time;
@@ -120,7 +120,7 @@ ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
 	/* Fallback */
 	if (!ah->ah_bwmode) {
 		__le16 raw_dur = ieee80211_generic_frame_duration(ah->hw,
-					NULL, len, rate);
+					NULL, band, len, rate);
 
 		/* subtract difference between long and short preamble */
 		dur = le16_to_cpu(raw_dur);
@@ -302,14 +302,15 @@ ath5k_hw_write_rate_duration(struct ath5k_hw *ah)
 		 * actual rate for this rate. See mac80211 tx.c
 		 * ieee80211_duration() for a brief description of
 		 * what rate we should choose to TX ACKs. */
-		tx_time = ath5k_hw_get_frame_duration(ah, 10, rate, false);
+		tx_time = ath5k_hw_get_frame_duration(ah, band, 10,
+					rate, false);
 
 		ath5k_hw_reg_write(ah, tx_time, reg);
 
 		if (!(rate->flags & IEEE80211_RATE_SHORT_PREAMBLE))
 			continue;
 
-		tx_time = ath5k_hw_get_frame_duration(ah, 10, rate, true);
+		tx_time = ath5k_hw_get_frame_duration(ah, band, 10, rate, true);
 		ath5k_hw_reg_write(ah, tx_time,
 			reg + (AR5K_SET_SHORT_PREAMBLE << 2));
 	}
diff --git a/drivers/net/wireless/ath/ath5k/qcu.c b/drivers/net/wireless/ath/ath5k/qcu.c
index a6de200538c3..65fe929529a8 100644
--- a/drivers/net/wireless/ath/ath5k/qcu.c
+++ b/drivers/net/wireless/ath/ath5k/qcu.c
@@ -565,6 +565,7 @@ ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
 int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah, unsigned int slot_time)
 {
 	struct ieee80211_channel *channel = ah->ah_current_channel;
+	enum ieee80211_band band;
 	struct ieee80211_rate *rate;
 	u32 ack_tx_time, eifs, eifs_clock, sifs, sifs_clock;
 	u32 slot_time_clock = ath5k_hw_htoclock(ah, slot_time);
@@ -600,11 +601,12 @@ int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah, unsigned int slot_time)
 	 * Also we have different lowest rate for 802.11a
 	 */
 	if (channel->band == IEEE80211_BAND_5GHZ)
-		rate = &ah->sbands[IEEE80211_BAND_5GHZ].bitrates[0];
+		band = IEEE80211_BAND_5GHZ;
 	else
-		rate = &ah->sbands[IEEE80211_BAND_2GHZ].bitrates[0];
+		band = IEEE80211_BAND_2GHZ;
 
-	ack_tx_time = ath5k_hw_get_frame_duration(ah, 10, rate, false);
+	rate = &ah->sbands[band].bitrates[0];
+	ack_tx_time = ath5k_hw_get_frame_duration(ah, band, 10, rate, false);
 
 	/* ack_tx_time includes an SIFS already */
 	eifs = ack_tx_time + sifs + 2 * slot_time;