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Merge branch 'acpica-fixes'

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* acpica-fixes:
  ACPICA: Tables: Mechanism to handle late stage acpi_get_table() imbalance
  Revert "ACPICA: Disassembler: Enhance resource descriptor detection"
This commit is contained in:
Rafael J. Wysocki 2017-06-15 01:52:32 +02:00
commit 9522933454
3 changed files with 39 additions and 18 deletions
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14
include/acpi/actbl.h
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@ -374,6 +374,20 @@ struct acpi_table_desc {
u16 validation_count;
};
/*
* Maximum value of the validation_count field in struct acpi_table_desc.
* When reached, validation_count cannot be changed any more and the table will
* be permanently regarded as validated.
*
* This is to prevent situations in which unbalanced table get/put operations
* may cause premature table unmapping in the OS to happen.
*
* The maximum validation count can be defined to any value, but should be
* greater than the maximum number of OS early stage mapping slots to avoid
* leaking early stage table mappings to the late stage.
*/
#define ACPI_MAX_TABLE_VALIDATIONS ACPI_UINT16_MAX
/* Masks for Flags field above */
#define ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL (0) /* Virtual address, external maintained */