summaryrefslogtreecommitdiffstats
path: root/include/net/mac80211.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/mac80211.h')
-rw-r--r--include/net/mac80211.h15
1 files changed, 13 insertions, 2 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index cb13239..025d4cc 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1753,8 +1753,19 @@ enum ieee80211_ampdu_mlme_action {
* that TX/RX_STOP can pass NULL for this parameter.
* The @buf_size parameter is only valid when the action is set to
* %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder
- * buffer size (number of subframes) for this session -- aggregates
- * containing more subframes than this may not be transmitted to the peer.
+ * buffer size (number of subframes) for this session -- the driver
+ * may neither send aggregates containing more subframes than this
+ * nor send aggregates in a way that lost frames would exceed the
+ * buffer size. If just limiting the aggregate size, this would be
+ * possible with a buf_size of 8:
+ * - TX: 1.....7
+ * - RX: 2....7 (lost frame #1)
+ * - TX: 8..1...
+ * which is invalid since #1 was now re-transmitted well past the
+ * buffer size of 8. Correct ways to retransmit #1 would be:
+ * - TX: 1 or 18 or 81
+ * Even "189" would be wrong since 1 could be lost again.
+ *
* Returns a negative error code on failure.
* The callback can sleep.
*
OpenPOWER on IntegriCloud