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Commit 262a2baf authored by Yijing Wang's avatar Yijing Wang Committed by Bjorn Helgaas
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PCI/MSI: Add weak pcibios_msi_controller() 



Add pcibios_msi_controller() to get the msi_controller associated with a
PCI device.  This is to allow arches to store the msi_controller in the
arch-specific PCI sysdata.

[bhelgaas: changelog, take pci_dev instead of pci_bus]
Suggested-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: default avatarYijing Wang <wangyijing@huawei.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent c2791b80

drivers/pci/msi.c

+16 −1
Original line number Diff line number Diff line
@@ -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)