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| author | Bob Moore <robert.moore@intel.com> | 2008-06-10 12:25:42 +0800 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2008-07-16 23:27:03 +0200 |
| commit | f3454ae8104efb2dbf0d08ec42c6f5d0fe9225bc (patch) | |
| tree | 61c85b910e1d56eb5245f1a9d81aead8206b7f87 /drivers/acpi/namespace | |
| parent | c735ab7da3414c3e639d5c5223092b74689e5d87 (diff) | |
| download | blackbird-op-linux-f3454ae8104efb2dbf0d08ec42c6f5d0fe9225bc.tar.gz blackbird-op-linux-f3454ae8104efb2dbf0d08ec42c6f5d0fe9225bc.zip | |
ACPICA: Add argument count checking to control method invocation via acpi_evaluate_object
Error if too few arguments, warning if too many. This applies
only to external programmatic control method execution, not
method-to-method calls within the AML.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'drivers/acpi/namespace')
| -rw-r--r-- | drivers/acpi/namespace/nseval.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c index 14bdfa92bea0..d369164e00b0 100644 --- a/drivers/acpi/namespace/nseval.c +++ b/drivers/acpi/namespace/nseval.c @@ -138,6 +138,41 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) return_ACPI_STATUS(AE_NULL_OBJECT); } + /* + * Calculate the number of arguments being passed to the method + */ + + info->param_count = 0; + if (info->parameters) { + while (info->parameters[info->param_count]) + info->param_count++; + } + + /* Error if too few arguments were passed in */ + + if (info->param_count < info->obj_desc->method.param_count) { + ACPI_ERROR((AE_INFO, + "Insufficient arguments - " + "method [%4.4s] needs %d, found %d", + acpi_ut_get_node_name(info->resolved_node), + info->obj_desc->method.param_count, + info->param_count)); + return_ACPI_STATUS(AE_MISSING_ARGUMENTS); + } + + /* Just a warning if too many arguments */ + + else if (info->param_count > + info->obj_desc->method.param_count) { + ACPI_WARNING((AE_INFO, + "Excess arguments - " + "method [%4.4s] needs %d, found %d", + acpi_ut_get_node_name(info-> + resolved_node), + info->obj_desc->method.param_count, + info->param_count)); + } + ACPI_DUMP_PATHNAME(info->resolved_node, "Execute Method:", ACPI_LV_INFO, _COMPONENT); |
