diff options
| author | Erik Schmauss <erik.schmauss@intel.com> | 2018-07-28 14:05:19 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-07-29 12:19:45 +0200 |
| commit | 460a53106ac39b74625d1104d9a113e0f3716c18 (patch) | |
| tree | 731d9e5ce02caaf4c9534044f93469ce430ffd12 /drivers | |
| parent | 73c2a01c52b657f4a0ead6c95f64c5279efbd000 (diff) | |
| download | linux-riscv-460a53106ac39b74625d1104d9a113e0f3716c18.tar.gz linux-riscv-460a53106ac39b74625d1104d9a113e0f3716c18.tar.bz2 linux-riscv-460a53106ac39b74625d1104d9a113e0f3716c18.zip | |
ACPICA: AML Parser: ignore control method status in module-level code
Previous change in the AML parser code blindly set all non-successful
dispatcher statuses to AE_OK. That approach is incorrect, though,
because successful control method invocations from module-level
return AE_CTRL_TRANSFER. Overwriting AE_OK to this status causes the
AML parser to think that there was no return value from the control
method invocation.
Fixes: 92c0f4af386 (ACPICA: AML Parser: ignore dispatcher error status during table load)
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/acpica/psloop.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/acpi/acpica/psloop.c b/drivers/acpi/acpica/psloop.c index ee840be150b5..44f35ab3347d 100644 --- a/drivers/acpi/acpica/psloop.c +++ b/drivers/acpi/acpica/psloop.c @@ -709,15 +709,20 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) } else if ((walk_state-> parse_flags & ACPI_PARSE_MODULE_LEVEL) + && status != AE_CTRL_TRANSFER && ACPI_FAILURE(status)) { /* - * ACPI_PARSE_MODULE_LEVEL means that we are loading a table by - * executing it as a control method. However, if we encounter - * an error while loading the table, we need to keep trying to - * load the table rather than aborting the table load. Set the - * status to AE_OK to proceed with the table load. If we get a - * failure at this point, it means that the dispatcher got an - * error while processing Op (most likely an AML operand error. + * ACPI_PARSE_MODULE_LEVEL flag means that we are currently + * loading a table by executing it as a control method. + * However, if we encounter an error while loading the table, + * we need to keep trying to load the table rather than + * aborting the table load (setting the status to AE_OK + * continues the table load). If we get a failure at this + * point, it means that the dispatcher got an error while + * processing Op (most likely an AML operand error) or a + * control method was called from module level and the + * dispatcher returned AE_CTRL_TRANSFER. In the latter case, + * leave the status alone, there's nothing wrong with it. */ status = AE_OK; } |