From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit 0c64a0dce51faa9c706fdf1f957d6f19878f4b81 ]
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: 37b7a97884ba64bf ("sh: machvec IO death.") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Rich Felker dalias@libc.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/sh/boards/mach-landisk/setup.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/sh/boards/mach-landisk/setup.c b/arch/sh/boards/mach-landisk/setup.c index f1147caebacf0..af69fb7fef7c7 100644 --- a/arch/sh/boards/mach-landisk/setup.c +++ b/arch/sh/boards/mach-landisk/setup.c @@ -85,6 +85,9 @@ device_initcall(landisk_devices_setup);
static void __init landisk_setup(char **cmdline_p) { + /* I/O port identity mapping */ + __set_io_port_base(0); + /* LED ON */ __raw_writeb(__raw_readb(PA_LED) | 0x03, PA_LED);