Revert "kconfig: tristate choices with mixed tristate and boolean values"

This reverts commit a5bf3d891a6a0fb5aa122792d965e3774108b923.

David Brownell notes that this causes a regression visible in the
drivers/usb/gadget Kconfig file:

  "That Kconfig hasn't changed (other than adding new drivers), and it's
   worked that way for several years now ...  so the issue seems to be
   changes in menuconfig/kconfig/etc semantics.

   The issue is that when USB_GADGET=m, it's no longer possible to
   configure peripheral controller drivers as modules ...  the
   controller drivers can now only be configured for static linkage.

   It should be making a choice of one of the controller drivers which
   could work on the target system, and allow that driver to be linked
   either as a module (ok iff USB_GADGET=m) or statically."

Reverting this commit resolves the problem, and also fixes a second
problem that David noticed: various dependent options couldn't be enabled.

Tested-and-reported-by: David Brownell <david-b@pacbell.net>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Jan Beulich <jbeulich@novell.com>,
Cc: Andrew Morton <akpm@linux-foundation.org>,
Cc: Sam Ravnborg <sam@ravnborg.org>,
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 7bfa181..f9d0d91 100644 (file)
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -235,23 +235,16 @@ void menu_finalize(struct menu *parent)
        sym = parent->sym;
        if (parent->list) {
                if (sym && sym_is_choice(sym)) {
-                       /* find out choice type */
-                       enum symbol_type type = S_UNKNOWN;
-
+                       /* find the first choice value and find out choice type */
                        for (menu = parent->list; menu; menu = menu->next) {
-                               if (menu->sym && menu->sym->type != S_UNKNOWN) {
-                                       if (type == S_UNKNOWN)
-                                               type = menu->sym->type;
-                                       if (type != S_BOOLEAN)
-                                               break;
-                                       if (menu->sym->type == S_TRISTATE) {
-                                               type = S_TRISTATE;
-                                               break;
-                                       }
+                               if (menu->sym) {
+                                       current_entry = parent;
+                                       menu_set_type(menu->sym->type);
+                                       current_entry = menu;
+                                       menu_set_type(sym->type);
+                                       break;
                                }
                        }
-                       current_entry = parent;
-                       menu_set_type(type);
                        parentdep = expr_alloc_symbol(sym);
                } else if (parent->prompt)
                        parentdep = parent->prompt->visible.expr;
@@ -260,16 +253,7 @@ void menu_finalize(struct menu *parent)
 
                for (menu = parent->list; menu; menu = menu->next) {
                        basedep = expr_transform(menu->dep);
-                       dep = parentdep;
-                       if (sym && sym_is_choice(sym) && menu->sym) {
-                               enum symbol_type type = menu->sym->type;
-
-                               if (type == S_UNKNOWN)
-                                       type = sym->type;
-                            if (type != S_TRISTATE)
-                                       dep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
-                       }
-                       basedep = expr_alloc_and(expr_copy(dep), basedep);
+                       basedep = expr_alloc_and(expr_copy(parentdep), basedep);
                        basedep = expr_eliminate_dups(basedep);
                        menu->dep = basedep;
                        if (menu->sym)
@@ -342,8 +326,7 @@ void menu_finalize(struct menu *parent)
                                            "values not supported");
                        }
                        current_entry = menu;
-                       if (menu->sym->type == S_UNKNOWN)
-                               menu_set_type(sym->type);
+                       menu_set_type(sym->type);
                        menu_add_symbol(P_CHOICE, sym, NULL);
                        prop = sym_get_choice_prop(sym);
                        for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)