PCI_MSI_VEC_COUNT(9)                   Hardware Interfaces                   PCI_MSI_VEC_COUNT(9)



NAME
       pci_msi_vec_count - Return the number of MSI vectors a device can send

SYNOPSIS
       int pci_msi_vec_count(struct pci_dev * dev);

ARGUMENTS
       dev
           device to report about

DESCRIPTION
       This function returns the number of MSI vectors a device requested via Multiple Message
       Capable register. It returns a negative errno if the device is not capable sending MSI
       interrupts. Otherwise, the call succeeds and returns a power of two, up to a maximum of
       2^5 (32), according to the MSI specification.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      PCI_MSI_VEC_COUNT(9)