@@ -1143,6 +1143,13 @@ enum ieee80211_hw_flags {
* @napi_weight: weight used for NAPI polling. You must specify an
* appropriate value here if a napi_poll operation is provided
* by your driver.
+
+ * @max_rx_aggregation_subframes: maximum buffer size (number of
+ * sub-frames) to be used for A-MPDU block ack receiver
+ * aggregation.
+ * This is only relevant if the device has restrictions on the
+ * number of subframes, if it relies on mac80211 to do reordering
+ * it shouldn't be set.
*/
struct ieee80211_hw {
struct ieee80211_conf conf;
@@ -1161,6 +1168,7 @@ struct ieee80211_hw {
u8 max_rates;
u8 max_report_rates;
u8 max_rate_tries;
+ u8 max_rx_aggregation_subframes;
};
/**
@@ -232,6 +232,9 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
if (buf_size == 0)
buf_size = IEEE80211_MAX_AMPDU_BUF;
+ /* make sure the size doesn't exceed the maximum supported by the hw */
+ if (buf_size > local->hw.max_rx_aggregation_subframes)
+ buf_size = local->hw.max_rx_aggregation_subframes;
/* examine state machine */
mutex_lock(&sta->ampdu_mlme.mtx);
@@ -552,6 +552,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
local->hw.queues = 1;
local->hw.max_rates = 1;
local->hw.max_report_rates = 0;
+ local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
local->user_power_level = -1;