fbcon: Call fbcon_mode_deleted/new_modelist directly

I'm not entirely clear on what new_modelist actually does, it seems
exclusively for a sysfs interface. Which in the end does amount to a
normal fb_set_par to check the mode, but then takes a different path
in both fbmem.c and fbcon.c.

I have no idea why these 2 paths are different, but then I also don't
really want to find out. So just do the simple conversion to a direct
function call.

v2: static inline for the dummy versions, I forgot.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-fbdev@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-23-daniel.vetter@ffwll.ch

4 files changed, 16 insertions, 31 deletions

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 9994111f2563..24bd6cd270d5 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3019,8 +3019,8 @@ static void fbcon_set_all_vcs(struct fb_info *info)
                 fbcon_modechanged(info);
 }
 
-static int fbcon_mode_deleted(struct fb_info *info,
-                              struct fb_videomode *mode)
+int fbcon_mode_deleted(struct fb_info *info,
+                       struct fb_videomode *mode)
 {
         struct fb_info *fb_info;
         struct fbcon_display *p;
@@ -3262,7 +3262,7 @@ static void fbcon_fb_blanked(struct fb_info *info, int blank)
         ops->blank_state = blank;
 }
 
-static void fbcon_new_modelist(struct fb_info *info)
+void fbcon_new_modelist(struct fb_info *info)
 {
         int i;
         struct vc_data *vc;
@@ -3324,7 +3324,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 {
         struct fb_event *event = data;
         struct fb_info *info = event->info;
-        struct fb_videomode *mode;
         struct fb_con2fbmap *con2fb;
         struct fb_blit_caps *caps;
         int idx, ret = 0;
@@ -3336,10 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
         case FB_EVENT_MODE_CHANGE_ALL:
                 fbcon_set_all_vcs(info);
                 break;
-        case FB_EVENT_MODE_DELETE:
-                mode = event->data;
-                ret = fbcon_mode_deleted(info, mode);
-                break;
         case FB_EVENT_SET_CONSOLE_MAP:
                 /* called with console lock held */
                 con2fb = event->data;
@@ -3353,9 +3348,6 @@ static int fbcon_event_notify(struct notifier_block *self,
         case FB_EVENT_BLANK:
                 fbcon_fb_blanked(info, *(int *)event->data);
                 break;
-        case FB_EVENT_NEW_MODELIST:
-                fbcon_new_modelist(info);
-                break;
         case FB_EVENT_GET_REQ:
                 caps = event->data;
                 fbcon_get_requirement(info, caps);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 73269dedcd45..cbdd141e7695 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -966,16 +966,11 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
                 /* make sure we don't delete the videomode of current var */
                 ret = fb_mode_is_equal(&mode1, &mode2);
 
-                if (!ret) {
-                    struct fb_event event;
-
-                    event.info = info;
-                    event.data = &mode1;
-                    ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
-                }
+                if (!ret)
+                        fbcon_mode_deleted(info, &mode1);
 
                 if (!ret)
-                    fb_delete_videomode(&mode1, &info->modelist);
+                        fb_delete_videomode(&mode1, &info->modelist);
 
 
                 ret = (ret) ? -EINVAL : 0;
@@ -1992,7 +1987,6 @@ subsys_initcall(fbmem_init);
 
 int fb_new_modelist(struct fb_info *info)
 {
-        struct fb_event event;
         struct fb_var_screeninfo var = info->var;
         struct list_head *pos, *n;
         struct fb_modelist *modelist;
@@ -2012,14 +2006,12 @@ int fb_new_modelist(struct fb_info *info)
                 }
         }
 
-        err = 1;
+        if (list_empty(&info->modelist))
+                return 1;
 
-        if (!list_empty(&info->modelist)) {
-                event.info = info;
-                err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
-        }
+        fbcon_new_modelist(info);
 
-        return err;
+        return 0;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 794b386415b7..7a788ed8c7b5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,8 +126,6 @@ struct fb_cursor_user {
 
 /*      The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE            0x01
-/*      An entry from the modelist was removed */
-#define FB_EVENT_MODE_DELETE            0x04
 
 #ifdef CONFIG_GUMSTIX_AM200EPD
 /* only used by mach-pxa/am200epd.c */
@@ -142,9 +140,6 @@ struct fb_cursor_user {
 /*      A hardware display blank change occurred */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
-#define FB_EVENT_NEW_MODELIST           0x0A
-/*      The resolution of the passed in fb_info about to change and
-        all vc's should be changed         */
 #define FB_EVENT_MODE_CHANGE_ALL        0x0B
 /*      A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 790c42ec7b5d..c139834342f5 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -9,6 +9,9 @@ void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
 void fbcon_suspended(struct fb_info *info);
 void fbcon_resumed(struct fb_info *info);
+int fbcon_mode_deleted(struct fb_info *info,
+                       struct fb_videomode *mode);
+void fbcon_new_modelist(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -17,6 +20,9 @@ static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
 static inline void fbcon_suspended(struct fb_info *info) {}
 static inline void fbcon_resumed(struct fb_info *info) {}
+static inline int fbcon_mode_deleted(struct fb_info *info,
+                                     struct fb_videomode *mode) { return 0; }
+static inline void fbcon_new_modelist(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */