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PCI/MSI: Add weak pcibios_msi_controller()

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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: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yijing Wang 2014-11-11 15:22:45 -07:00 committed by Bjorn Helgaas
parent c2791b8069
commit 262a2baf9e
1 changed files with 16 additions and 1 deletions
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17
drivers/pci/msi.c
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@ -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)