diff options
| author | Thierry Reding <treding@nvidia.com> | 2016-02-09 14:30:47 (GMT) |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-08 21:40:37 (GMT) |
| commit | 057bd2e0528ec68b3d0481ede0b26a31a9e5d2f1 (patch) | |
| tree | 625e014188543c4f109a06de166c61b72f64ca7a | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
| download | linux-057bd2e0528ec68b3d0481ede0b26a31a9e5d2f1.tar.xz | |
PCI: Add pci_ops.{add,remove}_bus() callbacks
Add pci_ops.{add,remove}_bus() callbacks, which will be called on every
newly created bus and when a bus is being removed, respectively. This can
be used by drivers to implement driver-specific initialization and teardown
of the bus, in addition to the architecture-specifics implemented by the
pcibios_add_bus() and the pcibios_remove_bus() functions.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | drivers/pci/probe.c | 6 | ||||
| -rw-r--r-- | drivers/pci/remove.c | 4 | ||||
| -rw-r--r-- | include/linux/pci.h | 2 |
3 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 6d7ab9b..3ea4de1 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -758,6 +758,12 @@ add_dev: pcibios_add_bus(child); + if (child->ops->add_bus) { + ret = child->ops->add_bus(child); + if (WARN_ON(ret < 0)) + dev_err(&child->dev, "failed to add bus: %d\n", ret); + } + /* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(child); diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 8a280e9..d35c7fc 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -54,6 +54,10 @@ void pci_remove_bus(struct pci_bus *bus) pci_bus_release_busn_res(bus); up_write(&pci_bus_sem); pci_remove_legacy_files(bus); + + if (bus->ops->remove_bus) + bus->ops->remove_bus(bus); + pcibios_remove_bus(bus); device_unregister(&bus->dev); } diff --git a/include/linux/pci.h b/include/linux/pci.h index 27df4a6..0f7ef14 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -578,6 +578,8 @@ static inline int pcibios_err_to_errno(int err) /* Low-level architecture-dependent routines */ struct pci_ops { + int (*add_bus)(struct pci_bus *bus); + void (*remove_bus)(struct pci_bus *bus); void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where); int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); |