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iwlwifi: pcie: clear trans reference on queue stop

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Currently when stop flow is performed, there might be transport TX RTPM
references that are not freed in case we unmap a queue that still has
packets not reclaimed. Fix that.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Sara Sharon 2016-03-09 17:38:47 +02:00 committed by Emmanuel Grumbach
parent 1200b6809d
commit 01d11cd12d
1 changed files with 36 additions and 23 deletions
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59
drivers/net/wireless/intel/iwlwifi/pcie/tx.c
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@ -596,6 +596,28 @@ static void iwl_pcie_free_tso_page(struct sk_buff *skb)
}
}
static void iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
lockdep_assert_held(&trans_pcie->reg_lock);
if (trans_pcie->ref_cmd_in_flight) {
trans_pcie->ref_cmd_in_flight = false;
IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n");
iwl_trans_pcie_unref(trans);
}
if (!trans->cfg->base_params->apmg_wake_up_wa)
return;
if (WARN_ON(!trans_pcie->cmd_hold_nic_awake))
return;
trans_pcie->cmd_hold_nic_awake = false;
__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
}
/*
* iwl_pcie_txq_unmap - Unmap any remaining DMA mappings and free skb's
*/
@ -620,6 +642,20 @@ static void iwl_pcie_txq_unmap(struct iwl_trans *trans, int txq_id)
}
iwl_pcie_txq_free_tfd(trans, txq);
q->read_ptr = iwl_queue_inc_wrap(q->read_ptr);
if (q->read_ptr == q->write_ptr) {
unsigned long flags;
spin_lock_irqsave(&trans_pcie->reg_lock, flags);
if (txq_id != trans_pcie->cmd_queue) {
IWL_DEBUG_RPM(trans, "Q %d - last tx freed\n",
q->id);
iwl_trans_pcie_unref(trans);
} else {
iwl_pcie_clear_cmd_in_flight(trans);
}
spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
}
}
txq->active = false;
@ -1148,29 +1184,6 @@ static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans,
return 0;
}
static int iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
lockdep_assert_held(&trans_pcie->reg_lock);
if (trans_pcie->ref_cmd_in_flight) {
trans_pcie->ref_cmd_in_flight = false;
IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n");
iwl_trans_pcie_unref(trans);
}
if (trans->cfg->base_params->apmg_wake_up_wa) {
if (WARN_ON(!trans_pcie->cmd_hold_nic_awake))
return 0;
trans_pcie->cmd_hold_nic_awake = false;
__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
}
return 0;
}
/*
* iwl_pcie_cmdq_reclaim - Reclaim TX command queue entries already Tx'd
*