Commit 0c64a0dc authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Rich Felker

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: 37b7a978 ("sh: machvec IO death.")
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarRich Felker <dalias@libc.org>
parent 03dd061f
...@@ -82,6 +82,9 @@ device_initcall(landisk_devices_setup); ...@@ -82,6 +82,9 @@ device_initcall(landisk_devices_setup);
static void __init landisk_setup(char **cmdline_p) static void __init landisk_setup(char **cmdline_p)
{ {
/* I/O port identity mapping */
__set_io_port_base(0);
/* LED ON */ /* LED ON */
__raw_writeb(__raw_readb(PA_LED) | 0x03, PA_LED); __raw_writeb(__raw_readb(PA_LED) | 0x03, PA_LED);
......
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