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ACPICA: Fix table compare code, length then data 

Split the ACPI table compare. First check that the lengths match
exactly. Then compare the data.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2008-07-04 10:57:51 +08:00 committed by Len Brown
parent 9db4fcd99f
commit a6f30539f3
1 changed files with 9 additions and 5 deletions
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14
drivers/acpi/tables/tbinstal.c
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@ -110,7 +110,6 @@ acpi_status
acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
{
u32 i;
u32 length;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_add_table);
@ -145,13 +144,18 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
}
}
/* Check for a table match on the entire table length */
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (table_desc->length !=
acpi_gbl_root_table_list.tables[i].length) {
continue;
}
length = ACPI_MIN(table_desc->length,
acpi_gbl_root_table_list.tables[i].length);
if (ACPI_MEMCMP(table_desc->pointer,
acpi_gbl_root_table_list.tables[i].pointer,
length)) {
acpi_gbl_root_table_list.tables[i].length)) {
continue;
}