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mips: dmi: Fix early remap on MIPS32

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[ Upstream commit 0d0a3748a2 ]

dmi_early_remap() has been defined as ioremap_cache() which on MIPS32 gets
to be converted to the VM-based mapping. DMI early remapping is performed
at the setup_arch() stage with no VM available. So calling the
dmi_early_remap() for MIPS32 causes the system to crash at the early boot
time. Fix that by converting dmi_early_remap() to the uncached remapping
which is always available on both 32 and 64-bits MIPS systems.

Note this change shall not cause any regressions on the current DMI
support implementation because on the early boot-up stage neither MIPS32
nor MIPS64 has the cacheable ioremapping support anyway.

Fixes: be8fa1cb44 ("MIPS: Add support for Desktop Management Interface (DMI)")
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Serge Semin 2023-12-02 14:14:18 +03:00 committed by Greg Kroah-Hartman
parent e341194063
commit 1961a29b89
1 changed files with 1 additions and 1 deletions
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2
arch/mips/include/asm/dmi.h
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@ -5,7 +5,7 @@
#include <linux/io.h>
#include <linux/memblock.h>
#define dmi_early_remap(x, l) ioremap_cache(x, l)
#define dmi_early_remap(x, l) ioremap(x, l)
#define dmi_early_unmap(x, l) iounmap(x)
#define dmi_remap(x, l) ioremap_cache(x, l)
#define dmi_unmap(x) iounmap(x)