From 4c8bb609d304df72858aa2e5e74abab5246bd24b Mon Sep 17 00:00:00 2001 From: Igor Russkikh Date: Thu, 19 Oct 2017 18:23:56 +0300 Subject: [PATCH] net: aquantia: Limit number of MSIX irqs to the number of cpus There is no much practical use from having MSIX vectors more that number of cpus, thus cap this first with preconfigured limit, then with number of cpus online. Signed-off-by: Pavel Belous Signed-off-by: Igor Russkikh Signed-off-by: David S. Miller --- drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c index 4c6c882c6a1c..727f0a446ef1 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c @@ -85,6 +85,7 @@ int aq_pci_func_init(struct aq_pci_func_s *self) int err = 0; unsigned int bar = 0U; unsigned int port = 0U; + unsigned int numvecs = 0U; err = pci_enable_device(self->pdev); if (err < 0) @@ -142,10 +143,12 @@ int aq_pci_func_init(struct aq_pci_func_s *self) } } - /*enable interrupts */ + numvecs = min((u8)AQ_CFG_VECS_DEF, self->aq_hw_caps.msix_irqs); + numvecs = min(numvecs, num_online_cpus()); + + /* enable interrupts */ #if !AQ_CFG_FORCE_LEGACY_INT - err = pci_alloc_irq_vectors(self->pdev, self->aq_hw_caps.msix_irqs, - self->aq_hw_caps.msix_irqs, PCI_IRQ_MSIX); + err = pci_alloc_irq_vectors(self->pdev, numvecs, numvecs, PCI_IRQ_MSIX); if (err < 0) { err = pci_alloc_irq_vectors(self->pdev, 1, 1, @@ -153,7 +156,7 @@ int aq_pci_func_init(struct aq_pci_func_s *self) if (err < 0) goto err_exit; } -#endif +#endif /* AQ_CFG_FORCE_LEGACY_INT */ /* net device init */ for (port = 0; port < self->ports; ++port) { -- 2.20.1