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net: aquantia: Limit number of MSIX irqs to the number of cpus

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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 <pavel.belous@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Igor Russkikh 2017-10-19 18:23:56 +03:00 committed by David S. Miller
parent 93d87b8fbe
commit 4c8bb609d3
1 changed files with 7 additions and 4 deletions
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11
drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
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@ -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) {