iwlwifi: mvm: implement driver RX queues sync command

mac80211 will call the driver whenever there is a race between
RSS queues and control path that requires a processing of all
pending frames in RSS queues.
Implement that by utilizing the internal notification mechanism:
queue a message to all queues. When the message is received on
a queue it decrements the atomic counter. This guarantees that
all pending frames in the RX queue were processed since the message
is in order inside the queue.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 8bfb8e06a90c..7c6a5984105f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -586,6 +586,8 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
         skb_queue_head_init(&mvm->d0i3_tx);
         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 
+        atomic_set(&mvm->queue_sync_counter, 0);
+
         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 
         /*