diff options
| author | Bob Moore <robert.moore@intel.com> | 2010-04-01 11:09:00 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-04-20 10:43:15 -0400 |
| commit | c1637e9c649a0eb72c467041d78275aabdd48a41 (patch) | |
| tree | 263487b920fcfb8796bcafe785e80a9756d7dd14 /drivers/acpi | |
| parent | 333b04ae338e3421297d46c508f053a6767d2883 (diff) | |
| download | linux-next-c1637e9c649a0eb72c467041d78275aabdd48a41.tar.gz | |
ACPICA: Add write support for DataTable operation regions
The original implementation only supported reading from a DataTable
region. However, some machines have been seen that actually write
to the ACPI table contained in such a region. This change adds
support for writing to a DataTable region.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/exregion.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c index a8703cc20ad1..531000fc77d2 100644 --- a/drivers/acpi/acpica/exregion.c +++ b/drivers/acpi/acpica/exregion.c @@ -491,8 +491,10 @@ acpi_ex_data_table_space_handler(u32 function, { ACPI_FUNCTION_TRACE(ex_data_table_space_handler); - /* Perform the memory read or write */ - + /* + * Perform the memory read or write. The bit_width was already + * validated. + */ switch (function) { case ACPI_READ: @@ -502,9 +504,14 @@ acpi_ex_data_table_space_handler(u32 function, break; case ACPI_WRITE: + + ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address), + ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width)); + break; + default: - return_ACPI_STATUS(AE_SUPPORT); + return_ACPI_STATUS(AE_BAD_PARAMETER); } return_ACPI_STATUS(AE_OK); |