diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/utresrc.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/utresrc.c b/drivers/acpi/acpica/utresrc.c index 70f78a4bf13b..d955bf852a03 100644 --- a/drivers/acpi/acpica/utresrc.c +++ b/drivers/acpi/acpica/utresrc.c @@ -184,9 +184,11 @@ acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state, ACPI_FUNCTION_TRACE(ut_walk_aml_resources); - /* The absolute minimum resource template is one end_tag descriptor */ - - if (aml_length < sizeof(struct aml_resource_end_tag)) { + /* + * The absolute minimum resource template is one end_tag descriptor. + * However, we will treat a lone end_tag as just a simple buffer. + */ + if (aml_length <= sizeof(struct aml_resource_end_tag)) { return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); } @@ -243,8 +245,10 @@ acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state, *context = aml; } - /* Normal exit */ - + /* + * Normal exit. Note: We allow the buffer to be larger than + * the resource template, as long as the END_TAG exists. + */ return_ACPI_STATUS(AE_OK); } |