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| author | Oliver O'Halloran <oohall@gmail.com> | 2020-07-22 09:57:00 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-26 16:34:21 +0300 |
| commit | 5609ffddd19dd52019d78b197e86b0331aeef8ae (patch) | |
| tree | 49e13b428f96dabcaf50159849bc90a7b3004274 /arch/powerpc/platforms/powernv/pci.h | |
| parent | a131bfc69bc868083a6c7f9b5dad1331902a3534 (diff) | |
| download | linux-5609ffddd19dd52019d78b197e86b0331aeef8ae.tar.xz | |
powerpc/powernv/pci: Add pci_bus_to_pnvhb() helper
Add a helper to go from a pci_bus structure to the pnv_phb that hosts
that bus. There's a lot of instances of the following pattern:
struct pci_controller *hose = pci_bus_to_host(pdev->bus);
struct pnv_phb *phb = hose->private_data;
Without any other uses of the pci_controller inside the function. This
is hard to read since it requires you to memorise the contents of the
private data fields and kind of error prone since it involves blindly
assigning a void pointer. Add a helper to make it more concise and
explicit.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200722065715.1432738-1-oohall@gmail.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci.h')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index 51c254f2f3cb..0727dec9a0d1 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -260,4 +260,14 @@ extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl, extern unsigned long pnv_ioda_parse_tce_sizes(struct pnv_phb *phb); +static inline struct pnv_phb *pci_bus_to_pnvhb(struct pci_bus *bus) +{ + struct pci_controller *hose = bus->sysdata; + + if (hose) + return hose->private_data; + + return NULL; +} + #endif /* __POWERNV_PCI_H */ |