diff options
Diffstat (limited to 'drivers/acpi/acpica/exoparg1.c')
| -rw-r--r-- | drivers/acpi/acpica/exoparg1.c | 58 |
1 files changed, 47 insertions, 11 deletions
diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c index 814b4a3d656..1b8e9410440 100644 --- a/drivers/acpi/acpica/exoparg1.c +++ b/drivers/acpi/acpica/exoparg1.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2013, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -115,7 +115,7 @@ acpi_status acpi_ex_opcode_0A_0T_1R(struct acpi_walk_state *walk_state) break; } - cleanup: +cleanup: /* Delete return object on error */ @@ -234,7 +234,7 @@ acpi_status acpi_ex_opcode_1A_1T_0R(struct acpi_walk_state *walk_state) goto cleanup; } - cleanup: +cleanup: return_ACPI_STATUS(status); } @@ -551,7 +551,7 @@ acpi_status acpi_ex_opcode_1A_1T_1R(struct acpi_walk_state *walk_state) status = acpi_ex_store(return_desc, operand[1], walk_state); } - cleanup: +cleanup: /* Delete return object on error */ @@ -962,10 +962,17 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state) */ return_desc = *(operand[0]->reference.where); - if (return_desc) { - acpi_ut_add_reference - (return_desc); + if (!return_desc) { + /* + * Element is NULL, do not allow the dereference. + * This provides compatibility with other ACPI + * implementations. + */ + return_ACPI_STATUS + (AE_AML_UNINITIALIZED_ELEMENT); } + + acpi_ut_add_reference(return_desc); break; default: @@ -990,11 +997,40 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state) acpi_namespace_node *) return_desc); - } + if (!return_desc) { + break; + } - /* Add another reference to the object! */ + /* + * June 2013: + * buffer_fields/field_units require additional resolution + */ + switch (return_desc->common.type) { + case ACPI_TYPE_BUFFER_FIELD: + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: - acpi_ut_add_reference(return_desc); + status = + acpi_ex_read_data_from_field + (walk_state, return_desc, + &temp_desc); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + return_desc = temp_desc; + break; + + default: + + /* Add another reference to the object */ + + acpi_ut_add_reference + (return_desc); + break; + } + } break; default: @@ -1018,7 +1054,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state) goto cleanup; } - cleanup: +cleanup: /* Delete return object on error */ |