diff options
authorGeert Uytterhoeven <>2020-08-14 14:42:45 +0200
committerRich Felker <>2020-08-14 22:43:17 -0400
commit0c64a0dce51faa9c706fdf1f957d6f19878f4b81 (patch)
parent03dd061f0d203c3479791490d6b9359b2eaf9fec (diff)
sh: landisk: Add missing initialization of sh_io_port_basesh-for-5.9
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 <> Signed-off-by: Rich Felker <>
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-landisk/setup.c b/arch/sh/boards/mach-landisk/setup.c
index 16b4d8b0bb85..2c44b94f82fb 100644
--- a/arch/sh/boards/mach-landisk/setup.c
+++ b/arch/sh/boards/mach-landisk/setup.c
@@ -82,6 +82,9 @@ 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);