From 33b56af188ddbd1027b7eaff7abb1507b708f155 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Thu, 25 Jun 2015 12:55:45 +0300 Subject: [PATCH] iwlwifi: pcie: add missing calls to synchronize_irq() In a few places, we were disabling interrupts but didn't make sure that the interrupt handler has finished running. Add calls to synchronize_irq() to ensure we finish handling the interrupts before we free resources or other things that could lead to a crash if the interrupt were to be handled later. Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/trans.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 23f2824e8d56..4cdfb2fd992a 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -1178,6 +1178,8 @@ void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state) static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test) { + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + iwl_disable_interrupts(trans); /* @@ -1189,6 +1191,8 @@ static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test) iwl_pcie_disable_ict(trans); + synchronize_irq(trans_pcie->pci_dev->irq); + iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); iwl_clear_bit(trans, CSR_GP_CNTRL, @@ -1326,7 +1330,10 @@ static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans) spin_unlock(&trans_pcie->irq_lock); iwl_pcie_disable_ict(trans); + mutex_unlock(&trans_pcie->mutex); + + synchronize_irq(trans_pcie->pci_dev->irq); } static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val) -- 2.20.1