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05 April 2024, 19:05:47 UTC
Revision bfa37087aa04e45f56c41142dfceecb79b8e6ef9 authored by Darren Stevens on 29 June 2016, 20:06:28 UTC, committed by Michael Ellerman on 30 June 2016, 06:52:29 UTC 
powerpc: Initialise pci_io_base as early as possible
 
Commit d6a9996e84ac ("powerpc/mm: vmalloc abstraction in preparation for
radix") turned kernel memory and IO addresses from #defined constants to
variables initialised at runtime.

On PA6T (pasemi) systems the setup_arch() machine call initialises the
onboard PCI-e root-ports, and uses pci_io_base to do this, which is now
before its value has been set, resulting in a panic early in boot before
console IO is initialised.

Move the pci_io_base initialisation to the same place as vmalloc ranges
are set (hash__early_init_mmu()/radix__early_init_mmu()) - this is the
earliest possible place we can initialise it.

Fixes: d6a9996e84ac ("powerpc/mm: vmalloc abstraction in preparation for radix")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Add #ifdef CONFIG_PCI, massage change log slightly]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
1 parent 190ce86
History
Tip revision: bfa37087aa04e45f56c41142dfceecb79b8e6ef9 authored by Darren Stevens on 29 June 2016, 20:06:28 UTC
powerpc: Initialise pci_io_base as early as possible
Tip revision: bfa3708
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.get_maintainer.ignore -rw-r--r-- 31 bytes
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