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sh: landisk: Add missing initialization of sh_io_port_base
The Landisk setup code maps the CF IDE area using ioremap_prot(), and
passes the resulting virtual addresses to the pata_platform driver,
disguising them as I/O port addresses. Hence the pata_platform driver
translates them again using ioport_map().
As CONFIG_GENERIC_IOMAP=n, and CONFIG_HAS_IOPORT_MAP=y, the
SuperH-specific mapping code in arch/sh/kernel/ioport.c translates
I/O port addresses to virtual addresses by adding sh_io_port_base, which
defaults to -1, thus breaking the assumption of an identity mapping.
Fix this by setting sh_io_port_base to zero.
Fixes: 37b7a97884
("sh: machvec IO death.")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rich Felker <dalias@libc.org>
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1 changed files with 3 additions and 0 deletions
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@ -82,6 +82,9 @@ device_initcall(landisk_devices_setup);
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static void __init landisk_setup(char **cmdline_p)
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{
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/* I/O port identity mapping */
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__set_io_port_base(0);
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/* LED ON */
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__raw_writeb(__raw_readb(PA_LED) | 0x03, PA_LED);
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