diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2020-09-02 04:36:57 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-01-31 14:35:51 +0300 |
| commit | 24b4c6b1a7fc79fe8142d50cb439944b81b659ff (patch) | |
| tree | f23b1d184eb90d1eb2124c235e306cc8331597b5 /arch/powerpc/platforms/powernv/pci.h | |
| parent | 6895c5ba7bdcc55eacad03cf309ab23be63b9cac (diff) | |
| download | linux-24b4c6b1a7fc79fe8142d50cb439944b81b659ff.tar.xz | |
powerpc/powernv/pci: Drop pnv_phb->initialized
The pnv_phb->initialized flag is an odd beast. It was added back in 2012 in
commit db1266c85261 ("powerpc/powernv: Skip check on PE if necessary") to
allow devices to be enabled even if the device had not yet been assigned to
a PE. Allowing the device to be enabled before the PE is configured may
cause spurious EEH events since none of the IOMMU context has been setup.
I'm not entirely sure why this was ever necessary. My best guess is that it
was an workaround for a bug or some other undesireable behaviour from the
PCI core. Either way, it's unnecessary now since as of commit dc3d8f85bb57
("powerpc/powernv/pci: Re-work bus PE configuration") we can guarantee that
the PE will be configured before the PCI core will allow drivers to bind to
the device.
It's also worth pointing out that the ->initialized flag is only set in
pnv_pci_ioda_create_dbgfs(). That function has its entire body wrapped
in #ifdef CONFIG_DEBUG_FS. As a result, for kernels built without debugfs
(i.e. petitboot) the other checks in pnv_pci_enable_device_hook() are
bypassed entirely.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200902013657.1753830-1-oohall@gmail.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci.h')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index 739a0b3b72e1..36d22920f5a3 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -119,7 +119,6 @@ struct pnv_phb { int flags; void __iomem *regs; u64 regs_phys; - int initialized; spinlock_t lock; #ifdef CONFIG_DEBUG_FS |