diff --git a/[refs] b/[refs]
index ed698a3fc2c0..f04d4d1f991f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a7499bc84eabb200f9dc23770a46d9a31b1e763a
+refs/heads/master: 333b04ae338e3421297d46c508f053a6767d2883
diff --git a/trunk/drivers/acpi/acpica/tbxface.c b/trunk/drivers/acpi/acpica/tbxface.c
index 5217a6159a31..684614d0d327 100644
--- a/trunk/drivers/acpi/acpica/tbxface.c
+++ b/trunk/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;