From 4cf7ac4b12035ac92d13a249ce36653b9bcac081 Mon Sep 17 00:00:00 2001 From: Haim Dreyfuss Date: Tue, 26 Jul 2016 18:03:07 +0300 Subject: [PATCH] iwlwifi: pcie: replace possible_cpus() with online_cpus() in MSIX mode In MSIX mode the number of irq depends on the number of possible cpus existing on the host. This cause to bug in case there are offline cores. Take into account only the online CPUs instead. Also save it in temporary variable. Fixes: commit beaaf9814e9c ("iwlwifi: pcie: Add new configuration to enable MSIX") Signed-off-by: Haim Dreyfuss Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 43c3915ed3529..188b0dee542cd 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1513,13 +1513,14 @@ static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev, struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int max_irqs, num_irqs, i, ret; + int max_irqs, num_irqs, i, ret, nr_online_cpus; u16 pci_cmd; if (!trans->cfg->mq_rx_supported) goto enable_msi; - max_irqs = min_t(u32, num_possible_cpus() + 2, IWL_MAX_RX_HW_QUEUES); + nr_online_cpus = num_online_cpus(); + max_irqs = min_t(u32, nr_online_cpus + 2, IWL_MAX_RX_HW_QUEUES); for (i = 0; i < max_irqs; i++) trans_pcie->msix_entries[i].entry = i; @@ -1545,11 +1546,11 @@ static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev, * Two interrupts less: non rx causes shared with FBQ and RSS. * More than two interrupts: we will use fewer RSS queues. */ - if (num_irqs <= num_online_cpus()) { + if (num_irqs <= nr_online_cpus) { trans_pcie->trans->num_rx_queues = num_irqs + 1; trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX | IWL_SHARED_IRQ_FIRST_RSS; - } else if (num_irqs == num_online_cpus() + 1) { + } else if (num_irqs == nr_online_cpus + 1) { trans_pcie->trans->num_rx_queues = num_irqs; trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX; } else { -- 2.39.5