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iwlwifi: mvm: track the number of Rx BA sessions 

The firmware / HW can't support more than 16 Rx BA sessions.
Deny any attemps to open more sessions than that.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
hifive-unleashed-5.1
Emmanuel Grumbach 2013-07-02 14:16:38 +03:00 committed by Johannes Berg
parent 93a426673f
commit 113a04470d
3 changed files with 17 additions and 0 deletions
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1
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -389,6 +389,7 @@ static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
ieee80211_wake_queues(mvm->hw);
mvm->vif_count = 0;
mvm->rx_ba_sessions = 0;
}
static int iwl_mvm_mac_start(struct ieee80211_hw *hw)

1
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -419,6 +419,7 @@ struct iwl_mvm {
struct work_struct sta_drained_wk;
unsigned long sta_drained[BITS_TO_LONGS(IWL_MVM_STATION_COUNT)];
atomic_t pending_frames[IWL_MVM_STATION_COUNT];
u8 rx_ba_sessions;
/* configured by mac80211 */
u32 rts_threshold;

15
drivers/net/wireless/iwlwifi/mvm/sta.c
View File

@ -608,6 +608,8 @@ int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
return ret;
}
#define IWL_MAX_RX_BA_SESSIONS 16
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int tid, u16 ssn, bool start)
{
@ -618,6 +620,11 @@ int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
lockdep_assert_held(&mvm->mutex);
if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
return -ENOSPC;
}
cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
cmd.sta_id = mvm_sta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
@ -652,6 +659,14 @@ int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
break;
}
if (!ret) {
if (start)
mvm->rx_ba_sessions++;
else if (mvm->rx_ba_sessions > 0)
/* check that restart flow didn't zero the counter */
mvm->rx_ba_sessions--;
}
return ret;
}