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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 <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) {