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Diffstat (limited to 'drivers/acpi/executer/exfield.c')
-rw-r--r--drivers/acpi/executer/exfield.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/executer/exfield.c b/drivers/acpi/executer/exfield.c
index 22c8fa480f6..a690c925099 100644
--- a/drivers/acpi/executer/exfield.c
+++ b/drivers/acpi/executer/exfield.c
@@ -87,6 +87,9 @@ acpi_ex_read_data_from_field (
if (!obj_desc) {
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
+ if (!ret_buffer_desc) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_BUFFER_FIELD) {
/*
@@ -182,7 +185,7 @@ exit:
if (ACPI_FAILURE (status)) {
acpi_ut_remove_reference (buffer_desc);
}
- else if (ret_buffer_desc) {
+ else {
*ret_buffer_desc = buffer_desc;
}