PCI_ENABLE_MSI_BLOCK

Section: Hardware Interfaces (9)
Updated: February 2011
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NAME

pci_enable_msi_block - configure device's MSI capability structure  

SYNOPSIS

int pci_enable_msi_block(struct pci_dev * dev, unsigned 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.  

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