Return-path: Received: from he.sipsolutions.net ([78.46.109.217]:48532 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751862Ab2FKJxe (ORCPT ); Mon, 11 Jun 2012 05:53:34 -0400 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Emmanuel Grumbach Subject: [PATCH 08/13] iwlwifi: remove lock around txq_enable Date: Mon, 11 Jun 2012 11:53:07 +0200 Message-Id: <1339408392-19425-9-git-send-email-johannes@sipsolutions.net> (sfid-20120611_115351_143230_2CE3525B) In-Reply-To: <1339408392-19425-1-git-send-email-johannes@sipsolutions.net> References: <1339408392-19425-1-git-send-email-johannes@sipsolutions.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Emmanuel Grumbach This locking isn't needed. The only locking we need is when we access prph registers but there is already a separate lock for that. Since we haven't returned from the mac80211's IEEE80211_AMPDU_TX_OPERATIONAL ampdu_action, we cannot receive any Tx frame for that sta / tid while enabling the queue. Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- drivers/net/wireless/iwlwifi/pcie/internal.h | 5 +---- drivers/net/wireless/iwlwifi/pcie/trans.c | 5 ++--- drivers/net/wireless/iwlwifi/pcie/tx.c | 21 ++------------------- 3 files changed, 5 insertions(+), 26 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/internal.h b/drivers/net/wireless/iwlwifi/pcie/internal.h index 6c7b355..5024fb6 100644 --- a/drivers/net/wireless/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/iwlwifi/pcie/internal.h @@ -339,12 +339,9 @@ void iwl_tx_cmd_complete(struct iwl_trans *trans, void iwl_trans_txq_update_byte_cnt_tbl(struct iwl_trans *trans, struct iwl_tx_queue *txq, u16 byte_cnt); -void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue); -void __iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, - int fifo, int sta_id, int tid, - int frame_limit, u16 ssn); void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, int fifo, int sta_id, int tid, int frame_limit, u16 ssn); +void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue); void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq, enum dma_data_direction dma_dir); int iwl_tx_queue_reclaim(struct iwl_trans *trans, int txq_id, int index, diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 1904fda..4d4cbae 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -1068,9 +1068,8 @@ static void iwl_tx_start(struct iwl_trans *trans) for (i = 0; i < trans_pcie->n_q_to_fifo; i++) { int fifo = trans_pcie->setup_q_to_fifo[i]; - __iwl_trans_pcie_txq_enable(trans, i, fifo, IWL_INVALID_STATION, - IWL_TID_NON_QOS, - SCD_FRAME_LIMIT, 0); + iwl_trans_pcie_txq_enable(trans, i, fifo, IWL_INVALID_STATION, + IWL_TID_NON_QOS, SCD_FRAME_LIMIT, 0); } /* Activate all Tx DMA/FIFO channels */ diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c index 18e6c81..a092fb3 100644 --- a/drivers/net/wireless/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/iwlwifi/pcie/tx.c @@ -415,14 +415,11 @@ static inline void iwl_txq_set_inactive(struct iwl_trans *trans, u16 txq_id) (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); } -void __iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, - int fifo, int sta_id, int tid, - int frame_limit, u16 ssn) +void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, int fifo, + int sta_id, int tid, int frame_limit, u16 ssn) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - lockdep_assert_held(&trans_pcie->irq_lock); - if (test_and_set_bit(txq_id, trans_pcie->queue_used)) WARN_ONCE(1, "queue %d already used - expect issues", txq_id); @@ -480,20 +477,6 @@ void __iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, txq_id, fifo, ssn & 0xff); } -void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, int fifo, - int sta_id, int tid, int frame_limit, u16 ssn) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - unsigned long flags; - - spin_lock_irqsave(&trans_pcie->irq_lock, flags); - - __iwl_trans_pcie_txq_enable(trans, txq_id, fifo, sta_id, - tid, frame_limit, ssn); - - spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); -} - void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); -- 1.7.10