mwl8k: replace rateinfo bitfields with mask and shift macros

AFAICT, this driver is claiming that 24 bits of rate info fit into a
16-bit field in the Tx descriptor.  Anyway, the use of bitfields is
frowned-upon for a variety of well-documented reasons...

Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index b8f2b12..8a1b262 100644 (file)
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -1562,24 +1562,11 @@ static int mwl8k_tid_queue_mapping(u8 tid)
 
 /* The firmware will fill in the rate information
  * for each packet that gets queued in the hardware
- * in this structure
+ * and these macros will interpret that info.
  */
 
-struct rateinfo {
-       __le16  format:1;
-       __le16  short_gi:1;
-       __le16  band_width:1;
-       __le16  rate_id_mcs:6;
-       __le16  adv_coding:2;
-       __le16  antenna:2;
-       __le16  act_sub_chan:2;
-       __le16  preamble_type:1;
-       __le16  power_id:4;
-       __le16  antenna2:1;
-       __le16  reserved:1;
-       __le16  tx_bf_frame:1;
-       __le16  green_field:1;
-} __packed;
+#define RI_FORMAT(a)             (a & 0x0001)
+#define RI_RATE_ID_MCS(a)       ((a & 0x01f8) >> 3)
 
 static int
 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
@@ -1600,7 +1587,6 @@ mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
                struct ieee80211_sta *sta;
                struct mwl8k_sta *sta_info = NULL;
                u16 rate_info;
-               struct rateinfo *rate;
                struct ieee80211_hdr *wh;
 
                tx = txq->head;
@@ -1643,14 +1629,13 @@ mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
                                sta_info = MWL8K_STA(sta);
                                BUG_ON(sta_info == NULL);
                                rate_info = le16_to_cpu(tx_desc->rate_info);
-                               rate = (struct rateinfo *)&rate_info;
                                /* If rate is < 6.5 Mpbs for an ht station
                                 * do not form an ampdu. If the station is a
                                 * legacy station (format = 0), do not form an
                                 * ampdu
                                 */
-                               if (rate->rate_id_mcs < 1 ||
-                                   rate->format == 0) {
+                               if (RI_RATE_ID_MCS(rate_info) < 1 ||
+                                   RI_FORMAT(rate_info) == 0) {
                                        sta_info->is_ampdu_allowed = false;
                                } else {
                                        sta_info->is_ampdu_allowed = true;