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| author | Zhao Yakui <yakui.zhao@intel.com> | 2007-11-15 17:01:06 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-11-16 21:37:14 -0500 |
| commit | 49fbabf56dc715bbb51e59742e82ba762790aac0 (patch) | |
| tree | 3eaa894071469d36e614048f99f09f6e3e6f1b8b /drivers/acpi/osl.c | |
| parent | ef54d5ad2f58f899be6419fd1090cdeb2439851a (diff) | |
| download | linux-49fbabf56dc715bbb51e59742e82ba762790aac0.tar.gz linux-49fbabf56dc715bbb51e59742e82ba762790aac0.tar.bz2 linux-49fbabf56dc715bbb51e59742e82ba762790aac0.zip | |
ACPI: Handle I/O access width requestst that are not a multiple of 8 bits.
We've run into BIOS that hand us 4-bit access width requests
for T-state control when the code expected only multipls of 8-bits.
Round up.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index aabc6ca4a81c..e3a673a00845 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -387,17 +387,14 @@ acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) if (!value) value = &dummy; - switch (width) { - case 8: + *value = 0; + if (width <= 8) { *(u8 *) value = inb(port); - break; - case 16: + } else if (width <= 16) { *(u16 *) value = inw(port); - break; - case 32: + } else if (width <= 32) { *(u32 *) value = inl(port); - break; - default: + } else { BUG(); } @@ -408,17 +405,13 @@ EXPORT_SYMBOL(acpi_os_read_port); acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) { - switch (width) { - case 8: + if (width <= 8) { outb(value, port); - break; - case 16: + } else if (width <= 16) { outw(value, port); - break; - case 32: + } else if (width <= 32) { outl(value, port); - break; - default: + } else { BUG(); } |