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| author | Lv Zheng <lv.zheng@intel.com> | 2014-04-04 06:38:26 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-04-20 22:59:38 +0200 |
| commit | dc156adf0d1b9d9ea54a86ca803ac5202ab139c7 (patch) | |
| tree | fd87853be65ce947c2f3aa01b3dfec7743a9f031 /drivers/acpi/acpica/tbinstal.c | |
| parent | ACPICA: Remove indent divergences to reduce maintenance overhead. (diff) | |
| download | linux-dc156adf0d1b9d9ea54a86ca803ac5202ab139c7.tar.xz linux-dc156adf0d1b9d9ea54a86ca803ac5202ab139c7.zip | |
ACPICA: Tables: Fix the issues in handling virtual addressed tables.
When table is overridden or reloaded, acpi_tb_delete_table() is called where
struct acpi_table_desc.Pointer will be NULL. It thus is impossible for virtual
addressed tables to obtain the .Pointer again in acpi_tb_verify_table().
This patch stores virtual table addresses (ACPI_TABLE_ORIGIN_ALLOCATED,
ACPI_TABLE_ORIGIN_UNKNOWN, ACPI_TABLE_ORIGIN_OVERRIDE) in the
struct acpi_table_desc.Address field and refills the struct acpi_table_desc.Pointer
using these addresses in acpi_tb_verify_table(). Note that if a table with
ACPI_TABLE_ORIGIN_ALLOCATED set is actually freed, the .Address field
should be invalidated and thus must be replaced with NULL to avoid wrong
future validations occuring in acpi_tb_verify_table().
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/tbinstal.c')
| -rw-r--r-- | drivers/acpi/acpica/tbinstal.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c index 73fffb0f3dd3..144076ac21f0 100644 --- a/drivers/acpi/acpica/tbinstal.c +++ b/drivers/acpi/acpica/tbinstal.c @@ -69,11 +69,26 @@ acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc) /* Map the table if necessary */ if (!table_desc->pointer) { - if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) == - ACPI_TABLE_ORIGIN_MAPPED) { + switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) { + case ACPI_TABLE_ORIGIN_MAPPED: + table_desc->pointer = acpi_os_map_memory(table_desc->address, table_desc->length); + break; + + case ACPI_TABLE_ORIGIN_ALLOCATED: + case ACPI_TABLE_ORIGIN_UNKNOWN: + case ACPI_TABLE_ORIGIN_OVERRIDE: + + table_desc->pointer = + ACPI_CAST_PTR(struct acpi_table_header, + table_desc->address); + break; + + default: + + break; } if (!table_desc->pointer) { @@ -476,6 +491,7 @@ void acpi_tb_delete_table(struct acpi_table_desc *table_desc) case ACPI_TABLE_ORIGIN_ALLOCATED: ACPI_FREE(table_desc->pointer); + table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL); break; /* Not mapped or allocated, there is nothing we can do */ |