diff options
| author | Dan Carpenter <error27@gmail.com> | 2009-12-11 15:31:40 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-15 17:29:37 -0500 |
| commit | fbc3be2af3e8beb581a20c2a0cfda5692f5a1c08 (patch) | |
| tree | 24506f062acad2f1144b74abf801cb4ca57bcc7b /drivers/acpi/acpica | |
| parent | d4085a3ffee8828f7f1bae7fa3cf5e58f59ba627 (diff) | |
| download | lwn-fbc3be2af3e8beb581a20c2a0cfda5692f5a1c08.tar.gz lwn-fbc3be2af3e8beb581a20c2a0cfda5692f5a1c08.zip | |
ACPICA: Move check for valid Thread ID structure
This change moves the check for a valid Thread ID structure up a
few lines to insure that the check is made before the structure
is actually used.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
| -rw-r--r-- | drivers/acpi/acpica/exmutex.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c index 2f0114202b05..3c456bd575d0 100644 --- a/drivers/acpi/acpica/exmutex.c +++ b/drivers/acpi/acpica/exmutex.c @@ -375,6 +375,15 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED); } + /* Must have a valid thread ID */ + + if (!walk_state->thread) { + ACPI_ERROR((AE_INFO, + "Cannot release Mutex [%4.4s], null thread info", + acpi_ut_get_node_name(obj_desc->mutex.node))); + return_ACPI_STATUS(AE_AML_INTERNAL); + } + /* * The Mutex is owned, but this thread must be the owner. * Special case for Global Lock, any thread can release @@ -392,15 +401,6 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, return_ACPI_STATUS(AE_AML_NOT_OWNER); } - /* Must have a valid thread ID */ - - if (!walk_state->thread) { - ACPI_ERROR((AE_INFO, - "Cannot release Mutex [%4.4s], null thread info", - acpi_ut_get_node_name(obj_desc->mutex.node))); - return_ACPI_STATUS(AE_AML_INTERNAL); - } - /* * The sync level of the mutex must be equal to the current sync level. In * other words, the current level means that at least one mutex at that |