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Commit 59094065 authored by Thierry Reding's avatar Thierry Reding Committed by Bjorn Helgaas
Browse files

PCI: Allow driver-specific data in host bridge 



Provide a way to allocate driver-specific data along with a PCI host bridge
structure. The bridge's ->private field points to this data.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarBjorn Helgaas <helgaas@kernel.org>
parent 37d6a0a6

drivers/pci/probe.c

+3 −3
Original line number Diff line number Diff line
@@ -521,11 +521,11 @@ static void pci_release_host_bridge_dev(struct device *dev) 
	kfree(bridge);

}



static struct pci_host_bridge *pci_alloc_host_bridge(void)

static struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)

{

	struct pci_host_bridge *bridge;



	bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);

	bridge = kzalloc(sizeof(*bridge) + priv, GFP_KERNEL);

	if (!bridge)

		return NULL;
@@ -2253,7 +2253,7 @@ static struct pci_bus *pci_create_root_bus_msi(struct device *parent, 
	int error;

	struct pci_host_bridge *bridge;



	bridge = pci_alloc_host_bridge();

	bridge = pci_alloc_host_bridge(0);

	if (!bridge)

		return NULL;

include/linux/pci.h

+11 −0
Original line number Diff line number Diff line
@@ -434,10 +434,21 @@ struct pci_host_bridge { 
			resource_size_t start,

			resource_size_t size,

			resource_size_t align);

	unsigned long private[0] ____cacheline_aligned;

};



#define	to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)



static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)

{

	return (void *)bridge->private;

}



static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)

{

	return container_of(priv, struct pci_host_bridge, private);

}



struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);



void pci_set_host_bridge_release(struct pci_host_bridge *bridge,