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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2020-08-14 14:42:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 10:53:07 +0200 |
| commit | 56fd8add9de311704d88629c5bd297b7ff92bae8 (patch) | |
| tree | 3078c8fbf485fb02a9dd88335d951fe76017b240 /drivers/gpu/drm/imx/imx-ldb.c | |
| parent | 78cf8e807954e1c877044f9d11c27c8b9d2e9eac (diff) | |
sh: landisk: Add missing initialization of sh_io_port_base
[ 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>
Diffstat (limited to 'drivers/gpu/drm/imx/imx-ldb.c')
0 files changed, 0 insertions, 0 deletions