Commit 8fa1152f authored Nov 11, 2014 by Yijing Wang Committed by Alex Shi Nov 06, 2015

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>
(cherry picked from commit 262a2baf9e4a2fcedb6645ca98d77a1c12303a1d)

Signed-off-by: Alex Shi <alex.shi@linaro.org>

parent e5cf1528

drivers/pci/msi.c

+16 −1

Original line number	Diff line number	Diff line
		@@ -29,9 +29,24 @@ static int pci_msi_enable = 1;

		/* 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)