diff options
| -rw-r--r-- | drivers/pci/msi.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 0260f393321..6c1c1b9665a 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -30,9 +30,24 @@ int pci_msi_ignore_mask; /* Arch hooks */ +struct msi_controller * __weak pcibios_msi_controller(struct pci_dev *dev) +{ + return NULL; +} + +static struct msi_controller *pci_msi_controller(struct pci_dev *dev) +{ + struct msi_controller *msi_ctrl = dev->bus->msi; + + if (msi_ctrl) + return msi_ctrl; + + return pcibios_msi_controller(dev); +} + int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) { - struct msi_controller *chip = dev->bus->msi; + struct msi_controller *chip = pci_msi_controller(dev); int err; if (!chip || !chip->setup_irq) |