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| author | Takahisa Tanaka <mc74hc00@gmail.com> | 2013-01-13 21:01:57 -0500 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2013-03-01 06:19:26 -0500 |
| commit | 10ab329b5db7e592a3a60b4594e4e5f40b60c45c (patch) | |
| tree | 52e8c155fe20f181df604c3ac5cefa2a306c0bbb /drivers/watchdog/cpwd.c | |
| parent | 6737176569d1d6356c644694d60ea2b265cb3870 (diff) | |
watchdog: sp5100_tco: Fix wrong indirect I/O access for getting value of reserved bits
In case of SB800 or later chipset and re-programming MMIO address(*),
sp5100_tco module may read incorrect value of reserved bit, because the module
reads a value from an incorrect I/O address. However, this bug doesn't cause
a problem, because when re-programming MMIO address, by chance the module
writes zero (this is BIOS's default value) to the low three bits of register.
* In most cases, PC with SB8x0 or later chipset doesn't need to re-programming
MMIO address, because such PC can enable AcpiMmio and can use 0xfed80b00 for
watchdog register base address.
This patch fixes this bug.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43176
Signed-off-by: Takahisa Tanaka <mc74hc00@gmail.com>
Tested-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
Diffstat (limited to 'drivers/watchdog/cpwd.c')
0 files changed, 0 insertions, 0 deletions