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PCI: Allow driver-specific data in host bridge

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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: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
This commit is contained in:
Thierry Reding 2016-11-25 11:57:10 +01:00 committed by Bjorn Helgaas
parent 37d6a0a6f4
commit 5909406598
2 changed files with 14 additions and 3 deletions
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6
drivers/pci/probe.c
View file

@ -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;

11
include/linux/pci.h
View file

@ -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,