pci_enable_msi_block — configure device's MSI capability structure
int pci_enable_msi_block ( | struct pci_dev * dev, |
unsigned int nvec); |
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.