diff options
Diffstat (limited to 'drivers/acpi/resources/rscalc.c')
| -rw-r--r-- | drivers/acpi/resources/rscalc.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c index 7d6481d9fbec..223bdc493269 100644 --- a/drivers/acpi/resources/rscalc.c +++ b/drivers/acpi/resources/rscalc.c @@ -78,6 +78,7 @@ static u8 acpi_rs_count_set_bits(u16 bit_field) ACPI_FUNCTION_ENTRY(); for (bits_set = 0; bit_field; bits_set++) { + /* Zero the least significant bit that is set */ bit_field &= (bit_field - 1); @@ -154,6 +155,7 @@ acpi_rs_stream_option_length(u32 resource_length, * length, minus one byte for the resource_source_index itself. */ if (resource_length > minimum_aml_resource_length) { + /* Compute the length of the optional string */ string_length = @@ -162,7 +164,7 @@ acpi_rs_stream_option_length(u32 resource_length, /* Round up length to 32 bits for internal structure alignment */ - return (ACPI_ROUND_UP_to_32_bITS(string_length)); + return ((u32) ACPI_ROUND_UP_to_32_bITS(string_length)); } /******************************************************************************* @@ -191,6 +193,7 @@ acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) /* Traverse entire list of internal resource descriptors */ while (resource) { + /* Validate the descriptor type */ if (resource->type > ACPI_RESOURCE_TYPE_MAX) { @@ -214,6 +217,7 @@ acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) * is a Large Resource data type. */ if (resource->data.vendor.byte_length > 7) { + /* Base size of a Large resource descriptor */ total_size = @@ -346,6 +350,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, /* Walk the list of AML resource descriptors */ while (aml_buffer < end_aml) { + /* Validate the Resource Type and Resource Length */ status = acpi_ut_validate_resource(aml_buffer, &resource_index); @@ -390,7 +395,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Vendor Resource: * Ensure a 32-bit boundary for the structure */ - extra_struct_bytes = + extra_struct_bytes = (u32) ACPI_ROUND_UP_to_32_bITS(resource_length) - resource_length; break; @@ -407,7 +412,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Vendor Resource: * Add vendor data and ensure a 32-bit boundary for the structure */ - extra_struct_bytes = + extra_struct_bytes = (u32) ACPI_ROUND_UP_to_32_bITS(resource_length) - resource_length; break; @@ -431,7 +436,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, */ buffer++; - extra_struct_bytes = + extra_struct_bytes = (u32) /* * Add 4 bytes for each additional interrupt. Note: at * least one interrupt is required and is included in @@ -450,7 +455,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Add the size of any optional data (resource_source) * Ensure a 64-bit boundary for the structure */ - extra_struct_bytes = + extra_struct_bytes = (u32) ACPI_ROUND_UP_to_64_bITS (acpi_rs_stream_option_length (resource_length, minimum_aml_resource_length)); @@ -525,6 +530,7 @@ acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object, top_object_list = package_object->package.elements; for (index = 0; index < number_of_elements; index++) { + /* Dereference the sub-package */ package_element = *top_object_list; |