ACPICA: Clarify/rename some root table descriptor fields

Original fields were not very descriptive and led to maintenance
problems.  New fields should help to understand the existing code.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

6 files changed, 68 insertions, 65 deletions

diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 87f21d9d2a66..9070f1fe8f17 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -158,11 +158,10 @@ ACPI_EXTERN u32 acpi_gbl_trace_dbg_layer;
  ****************************************************************************/
 
 /*
- * acpi_gbl_root_table_list is the master list of ACPI tables found in the
- * RSDT/XSDT.
- *
+ * acpi_gbl_root_table_list is the master list of ACPI tables that were
+ * found in the RSDT/XSDT.
  */
-ACPI_EXTERN struct acpi_internal_rsdt acpi_gbl_root_table_list;
+ACPI_EXTERN struct acpi_table_list acpi_gbl_root_table_list;
 ACPI_EXTERN struct acpi_table_facs *acpi_gbl_FACS;
 
 /* These addresses are calculated from the FADT Event Block addresses */
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 5a6203a40c3e..0886a3dfe134 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -213,12 +213,12 @@ struct acpi_namespace_node {
 #define ANOBJ_IS_BIT_OFFSET             0x40    /* i_aSL only: Reference is a bit offset */
 #define ANOBJ_IS_REFERENCED             0x80    /* i_aSL only: Object was referenced */
 
-/* One internal RSDT for table management */
+/* Internal ACPI table management - master table list */
 
-struct acpi_internal_rsdt {
-        struct acpi_table_desc *tables;
-        u32 count;
-        u32 size;
+struct acpi_table_list {
+        struct acpi_table_desc *tables; /* Table descriptor array */
+        u32 current_table_count;        /* Tables currently in the array */
+        u32 max_table_count;    /* Max tables array will hold */
         u8 flags;
 };
 
diff --git a/drivers/acpi/acpica/tbfind.c b/drivers/acpi/acpica/tbfind.c
index e252180ce61c..989d5c867864 100644
--- a/drivers/acpi/acpica/tbfind.c
+++ b/drivers/acpi/acpica/tbfind.c
@@ -83,7 +83,7 @@ acpi_tb_find_table(char *signature,
 
         /* Search for the table */
 
-        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
                 if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
                                 header.signature, ACPI_NAME_SIZE)) {
 
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 7ec02b0f69e0..83d7af8d0905 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -137,7 +137,7 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
 
         /* Check if table is already registered */
 
-        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
                 if (!acpi_gbl_root_table_list.tables[i].pointer) {
                         status =
                             acpi_tb_verify_table(&acpi_gbl_root_table_list.
@@ -273,7 +273,7 @@ acpi_status acpi_tb_resize_root_table_list(void)
         /* Increase the Table Array size */
 
         tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list.
-                                       size +
+                                       max_table_count +
                                        ACPI_ROOT_TABLE_SIZE_INCREMENT) *
                                       sizeof(struct acpi_table_desc));
         if (!tables) {
@@ -286,8 +286,8 @@ acpi_status acpi_tb_resize_root_table_list(void)
 
         if (acpi_gbl_root_table_list.tables) {
                 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
-                            (acpi_size) acpi_gbl_root_table_list.size *
-                            sizeof(struct acpi_table_desc));
+                            (acpi_size) acpi_gbl_root_table_list.
+                            max_table_count * sizeof(struct acpi_table_desc));
 
                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
                         ACPI_FREE(acpi_gbl_root_table_list.tables);
@@ -295,8 +295,9 @@ acpi_status acpi_tb_resize_root_table_list(void)
         }
 
         acpi_gbl_root_table_list.tables = tables;
-        acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
-        acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
+        acpi_gbl_root_table_list.max_table_count +=
+            ACPI_ROOT_TABLE_SIZE_INCREMENT;
+        acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED;
 
         return_ACPI_STATUS(AE_OK);
 }
@@ -321,38 +322,36 @@ acpi_tb_store_table(acpi_physical_address address,
                     struct acpi_table_header *table,
                     u32 length, u8 flags, u32 *table_index)
 {
-        acpi_status status = AE_OK;
+        acpi_status status;
+        struct acpi_table_desc *new_table;
 
         /* Ensure that there is room for the table in the Root Table List */
 
-        if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
+        if (acpi_gbl_root_table_list.current_table_count >=
+            acpi_gbl_root_table_list.max_table_count) {
                 status = acpi_tb_resize_root_table_list();
                 if (ACPI_FAILURE(status)) {
                         return (status);
                 }
         }
 
+        new_table =
+            &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
+                                             current_table_count];
+
         /* Initialize added table */
 
-        acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-            address = address;
-        acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-            pointer = table;
-        acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
-            length;
-        acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-            owner_id = 0;
-        acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
-            flags;
-
-        ACPI_MOVE_32_TO_32(&
-                           (acpi_gbl_root_table_list.
-                            tables[acpi_gbl_root_table_list.count].signature),
-                           table->signature);
-
-        *table_index = acpi_gbl_root_table_list.count;
-        acpi_gbl_root_table_list.count++;
-        return (status);
+        new_table->address = address;
+        new_table->pointer = table;
+        new_table->length = length;
+        new_table->owner_id = 0;
+        new_table->flags = flags;
+
+        ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
+
+        *table_index = acpi_gbl_root_table_list.current_table_count;
+        acpi_gbl_root_table_list.current_table_count++;
+        return (AE_OK);
 }
 
 /*******************************************************************************
@@ -408,7 +407,7 @@ void acpi_tb_terminate(void)
 
         /* Delete the individual tables */
 
-        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
                 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
         }
 
@@ -422,7 +421,7 @@ void acpi_tb_terminate(void)
 
         acpi_gbl_root_table_list.tables = NULL;
         acpi_gbl_root_table_list.flags = 0;
-        acpi_gbl_root_table_list.count = 0;
+        acpi_gbl_root_table_list.current_table_count = 0;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
@@ -452,7 +451,7 @@ acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
                 return_ACPI_STATUS(status);
         }
 
-        if (table_index >= acpi_gbl_root_table_list.count) {
+        if (table_index >= acpi_gbl_root_table_list.current_table_count) {
 
                 /* The table index does not exist */
 
@@ -505,7 +504,7 @@ acpi_status acpi_tb_allocate_owner_id(u32 table_index)
         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        if (table_index < acpi_gbl_root_table_list.count) {
+        if (table_index < acpi_gbl_root_table_list.current_table_count) {
                 status = acpi_ut_allocate_owner_id
                     (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
         }
@@ -533,7 +532,7 @@ acpi_status acpi_tb_release_owner_id(u32 table_index)
         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        if (table_index < acpi_gbl_root_table_list.count) {
+        if (table_index < acpi_gbl_root_table_list.current_table_count) {
                 acpi_ut_release_owner_id(&
                                          (acpi_gbl_root_table_list.
                                           tables[table_index].owner_id));
@@ -564,7 +563,7 @@ acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        if (table_index < acpi_gbl_root_table_list.count) {
+        if (table_index < acpi_gbl_root_table_list.current_table_count) {
                 *owner_id =
                     acpi_gbl_root_table_list.tables[table_index].owner_id;
                 status = AE_OK;
@@ -589,7 +588,7 @@ u8 acpi_tb_is_table_loaded(u32 table_index)
         u8 is_loaded = FALSE;
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        if (table_index < acpi_gbl_root_table_list.count) {
+        if (table_index < acpi_gbl_root_table_list.current_table_count) {
                 is_loaded = (u8)
                     (acpi_gbl_root_table_list.tables[table_index].flags &
                      ACPI_TABLE_IS_LOADED);
@@ -616,7 +615,7 @@ void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
 {
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        if (table_index < acpi_gbl_root_table_list.count) {
+        if (table_index < acpi_gbl_root_table_list.current_table_count) {
                 if (is_loaded) {
                         acpi_gbl_root_table_list.tables[table_index].flags |=
                             ACPI_TABLE_IS_LOADED;
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index a9b105fc2e55..34f9c2bc5e1f 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -158,7 +158,7 @@ acpi_status acpi_tb_initialize_facs(void)
 u8 acpi_tb_tables_loaded(void)
 {
 
-        if (acpi_gbl_root_table_list.count >= 3) {
+        if (acpi_gbl_root_table_list.current_table_count >= 3) {
                 return (TRUE);
         }
 
@@ -707,14 +707,14 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
          */
         table_entry =
             ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
-        acpi_gbl_root_table_list.count = 2;
+        acpi_gbl_root_table_list.current_table_count = 2;
 
         /*
          * Initialize the root table array from the RSDT/XSDT
          */
         for (i = 0; i < table_count; i++) {
-                if (acpi_gbl_root_table_list.count >=
-                    acpi_gbl_root_table_list.size) {
+                if (acpi_gbl_root_table_list.current_table_count >=
+                    acpi_gbl_root_table_list.max_table_count) {
 
                         /* There is no more room in the root table array, attempt resize */
 
@@ -724,19 +724,20 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
                                               "Truncating %u table entries!",
                                               (unsigned) (table_count -
                                                (acpi_gbl_root_table_list.
-                                               count - 2))));
+                                                          current_table_count -
+                                                          2))));
                                 break;
                         }
                 }
 
                 /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
 
-                acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-                    address =
+                acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
+                                                current_table_count].address =
                     acpi_tb_get_root_table_entry(table_entry, table_entry_size);
 
                 table_entry += table_entry_size;
-                acpi_gbl_root_table_list.count++;
+                acpi_gbl_root_table_list.current_table_count++;
         }
 
         /*
@@ -749,7 +750,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
          * Complete the initialization of the root table array by examining
          * the header of each table
          */
-        for (i = 2; i < acpi_gbl_root_table_list.count; i++) {
+        for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) {
                 acpi_tb_install_table(acpi_gbl_root_table_list.tables[i].
                                       address, NULL, i);
 
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index adb7f56b853e..4a8b9e6ea57a 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -72,7 +72,7 @@ static int no_auto_ssdt;
 acpi_status acpi_allocate_root_table(u32 initial_table_count)
 {
 
-        acpi_gbl_root_table_list.size = initial_table_count;
+        acpi_gbl_root_table_list.max_table_count = initial_table_count;
         acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
 
         return (acpi_tb_resize_root_table_list());
@@ -130,7 +130,7 @@ acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
                             sizeof(struct acpi_table_desc));
 
                 acpi_gbl_root_table_list.tables = initial_table_array;
-                acpi_gbl_root_table_list.size = initial_table_count;
+                acpi_gbl_root_table_list.max_table_count = initial_table_count;
                 acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
                 if (allow_resize) {
                         acpi_gbl_root_table_list.flags |=
@@ -189,7 +189,8 @@ acpi_status acpi_reallocate_root_table(void)
          * increment to create the new table size.
          */
         current_size = (acpi_size)
-            acpi_gbl_root_table_list.count * sizeof(struct acpi_table_desc);
+            acpi_gbl_root_table_list.current_table_count *
+            sizeof(struct acpi_table_desc);
 
         new_size = current_size +
             (ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof(struct acpi_table_desc));
@@ -209,8 +210,9 @@ acpi_status acpi_reallocate_root_table(void)
          * 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.max_table_count =
+            acpi_gbl_root_table_list.current_table_count +
+            ACPI_ROOT_TABLE_SIZE_INCREMENT;
         acpi_gbl_root_table_list.flags =
             ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
 
@@ -291,7 +293,8 @@ acpi_get_table_header(char *signature,
 
         /* Walk the root table list */
 
-        for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
+        for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
+             i++) {
                 if (!ACPI_COMPARE_NAME
                     (&(acpi_gbl_root_table_list.tables[i].signature),
                      signature)) {
@@ -354,7 +357,7 @@ acpi_status acpi_unload_table_id(acpi_owner_id id)
         ACPI_FUNCTION_TRACE(acpi_unload_table_id);
 
         /* Find table in the global table list */
-        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
                 if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
                         continue;
                 }
@@ -404,7 +407,8 @@ acpi_get_table_with_size(char *signature,
 
         /* Walk the root table list */
 
-        for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
+        for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
+             i++) {
                 if (!ACPI_COMPARE_NAME
                     (&(acpi_gbl_root_table_list.tables[i].signature),
                      signature)) {
@@ -472,7 +476,7 @@ acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table)
 
         /* Validate index */
 
-        if (table_index >= acpi_gbl_root_table_list.count) {
+        if (table_index >= acpi_gbl_root_table_list.current_table_count) {
                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
                 return_ACPI_STATUS(AE_BAD_PARAMETER);
         }
@@ -523,7 +527,7 @@ static acpi_status acpi_tb_load_namespace(void)
          * Load the namespace. The DSDT is required, but any SSDT and
          * PSDT tables are optional. Verify the DSDT.
          */
-        if (!acpi_gbl_root_table_list.count ||
+        if (!acpi_gbl_root_table_list.current_table_count ||
             !ACPI_COMPARE_NAME(&
                                (acpi_gbl_root_table_list.
                                 tables[ACPI_TABLE_INDEX_DSDT].signature),
@@ -577,7 +581,7 @@ static acpi_status acpi_tb_load_namespace(void)
         /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
                 if ((!ACPI_COMPARE_NAME
                      (&(acpi_gbl_root_table_list.tables[i].signature),
                       ACPI_SIG_SSDT)