diff options
| author | Yijing Wang <wangyijing@huawei.com> | 2014-11-11 22:22:45 (GMT) |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-11-12 14:56:15 (GMT) |
| commit | 262a2baf9e4a2fcedb6645ca98d77a1c12303a1d (patch) | |
| tree | fdb14cdf9ff08208e1d0af9cd2229cb631f5894c /drivers/pci/msi.c | |
| parent | c2791b806988100cc1c047e2b0b5c5d0914aa3b6 (diff) | |
| download | linux-262a2baf9e4a2fcedb6645ca98d77a1c12303a1d.tar.xz | |
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: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/msi.c')
| -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 0260f39..6c1c1b9 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) |