centos man page for pci_enable_msi_block

PCI_ENABLE_MSI_BLOCK(9) 					Hardware Interfaces					   PCI_ENABLE_MSI_BLOCK(9)

NAME
       pci_enable_msi_block - configure device's MSI capability structure

SYNOPSIS
       int pci_enable_msi_block(struct pci_dev * dev, int nvec);

ARGUMENTS
       dev
	   device to configure

       nvec
	   number of interrupts to configure

DESCRIPTION
       Allocate IRQs for a device with the MSI capability. This function returns a negative errno if an error occurs. If it is unable to allocate
       the number of interrupts requested, it returns the number of interrupts it might be able to allocate. If it successfully allocates at least
       the number of interrupts requested, it returns 0 and updates the dev's irq member to the lowest new interrupt number; the other interrupt
       numbers allocated to this device are consecutive.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   PCI_ENABLE_MSI_BLOCK(9)