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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2021-05-20 06:29:19 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-05-20 09:43:26 +0300 |
| commit | e2f5efd0f0e229bd110eab513e7c0331d61a4649 (patch) | |
| tree | e76abd9031895dad3b1b086390570f12fdad4c8b /Documentation | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
| download | linux-e2f5efd0f0e229bd110eab513e7c0331d61a4649.tar.xz | |
powerpc: Fix early setup to make early_ioremap() work
The immediate problem is that after commit
0bd3f9e953bd ("powerpc/legacy_serial: Use early_ioremap()") the kernel
silently reboots on some systems.
The reason is that early_ioremap() returns broken addresses as it uses
slot_virt[] array which initialized with offsets from FIXADDR_TOP ==
IOREMAP_END+FIXADDR_SIZE == KERN_IO_END - FIXADDR_SIZ + FIXADDR_SIZE ==
__kernel_io_end which is 0 when early_ioremap_setup() is called.
__kernel_io_end is initialized little bit later in early_init_mmu().
This fixes the initialization by swapping early_ioremap_setup() and
early_init_mmu().
Fixes: 265c3491c4bc ("powerpc: Add support for GENERIC_EARLY_IOREMAP")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Drop unrelated cleanup & cleanup change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210520032919.358935-1-aik@ozlabs.ru
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions