ACPICA: Fix table entry truncation calculation

During early boot, ACPI RSDT/XSDT table entries are gathered into the
'initial_tables[]' array.  This array is currently statically defined (see
./drivers/acpi/tables.c).  When there are more table entries than can be
held in the 'initial_tables[]' array, the message "Truncating N table
entries!" is output.  As currently implemented, this message will always
erroneously calculate N as 0.

This patch fixes the calculation that determines how many table entries
will be missing (truncated).

This modification may be used under either the GPL or the BSD-style
license used for Intel ACPI CA code.

Signed-off-by: Myron Stowe <myron.stowe@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index 9684cc827930..22ce48985720 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -538,10 +538,9 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags)
                         if (ACPI_FAILURE(status)) {
                                 ACPI_WARNING((AE_INFO,
                                               "Truncating %u table entries!",
-                                              (unsigned)
-                                              (acpi_gbl_root_table_list.size -
-                                               acpi_gbl_root_table_list.
-                                               count)));
+                                              (unsigned) (table_count -
+                                               (acpi_gbl_root_table_list.
+                                               count - 2))));
                                 break;
                         }
                 }