mac80211: remove zero-length A-MPDU subframe reporting

As there's no driver using this capability and reporting zero-length
A-MPDU subframes for radiotap monitoring, remove the capability to
free up two RX flags.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index ff68b8c..7417fee 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -997,9 +997,6 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
  * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference
  *     number (@ampdu_reference) must be populated and be a distinct number for
  *     each A-MPDU
- * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes
- * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for
- *     monitoring purposes only
  * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all
  *     subframes of a single A-MPDU
  * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU
@@ -1039,8 +1036,7 @@ enum mac80211_rx_flags {
        RX_FLAG_NO_SIGNAL_VAL           = BIT(12),
        RX_FLAG_HT_GF                   = BIT(13),
        RX_FLAG_AMPDU_DETAILS           = BIT(14),
-       RX_FLAG_AMPDU_REPORT_ZEROLEN    = BIT(15),
-       RX_FLAG_AMPDU_IS_ZEROLEN        = BIT(16),
+       /* bits 15/16 free */
        RX_FLAG_AMPDU_LAST_KNOWN        = BIT(17),
        RX_FLAG_AMPDU_IS_LAST           = BIT(18),
        RX_FLAG_AMPDU_DELIM_CRC_ERROR   = BIT(19),

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 817bf22..9d95cb8 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -122,8 +122,7 @@ static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len,
        hdr = (void *)(skb->data + rtap_vendor_space);
 
        if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
-                           RX_FLAG_FAILED_PLCP_CRC |
-                           RX_FLAG_AMPDU_IS_ZEROLEN))
+                           RX_FLAG_FAILED_PLCP_CRC))
                return true;
 
        if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space))
@@ -391,10 +390,6 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
                        cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
                put_unaligned_le32(status->ampdu_reference, pos);
                pos += 4;
-               if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN)
-                       flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN;
-               if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN)
-                       flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN;
                if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
                        flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
                if (status->flag & RX_FLAG_AMPDU_IS_LAST)