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path: root/drivers/acpi/acpica/tbxface.c
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Diffstat (limited to 'drivers/acpi/acpica/tbxface.c')
-rw-r--r--drivers/acpi/acpica/tbxface.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 5217a6159a31..684614d0d327 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -172,6 +172,7 @@ acpi_status acpi_reallocate_root_table(void)
{
struct acpi_table_desc *tables;
acpi_size new_size;
+ acpi_size current_size;
ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
@@ -183,9 +184,15 @@ acpi_status acpi_reallocate_root_table(void)
return_ACPI_STATUS(AE_SUPPORT);
}
- new_size = ((acpi_size) acpi_gbl_root_table_list.count +
- ACPI_ROOT_TABLE_SIZE_INCREMENT) *
- sizeof(struct acpi_table_desc);
+ /*
+ * Get the current size of the root table and add the default
+ * increment to create the new table size.
+ */
+ current_size = (acpi_size)
+ acpi_gbl_root_table_list.count * sizeof(struct acpi_table_desc);
+
+ new_size = current_size +
+ (ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof(struct acpi_table_desc));
/* Create new array and copy the old array */
@@ -194,10 +201,16 @@ acpi_status acpi_reallocate_root_table(void)
return_ACPI_STATUS(AE_NO_MEMORY);
}
- ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size);
+ ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, current_size);
- acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count;
+ /*
+ * Update the root table descriptor. The new size will be the current
+ * number of tables plus the increment, independent of the reserved
+ * size of the original table list.
+ */
acpi_gbl_root_table_list.tables = tables;
+ acpi_gbl_root_table_list.size =
+ acpi_gbl_root_table_list.count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
acpi_gbl_root_table_list.flags =
ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;