fbcon: delay screen update when setting the mode of all consoles

If the current framebuffer console is rotated (rotate != 0), doing an
"fbset -a" will corrupt the current console.  Fix by updating the current
console only after all non-visible consoles have been updated.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index c8b4ae6..19dfdfb 100644 (file)
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -2849,7 +2849,7 @@ static void fbcon_set_all_vcs(struct fb_info *info)
        struct fbcon_ops *ops = info->fbcon_par;
        struct vc_data *vc;
        struct display *p;
-       int i, rows, cols;
+       int i, rows, cols, fg = -1;
 
        if (!ops || ops->currcon < 0)
                return;
@@ -2860,34 +2860,23 @@ static void fbcon_set_all_vcs(struct fb_info *info)
                    registered_fb[con2fb_map[i]] != info)
                        continue;
 
+               if (CON_IS_VISIBLE(vc)) {
+                       fg = i;
+                       continue;
+               }
+
                p = &fb_display[vc->vc_num];
                set_blitting_type(vc, info);
                var_to_display(p, &info->var, info);
-               cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
-               rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+               cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
+               rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
                cols /= vc->vc_font.width;
                rows /= vc->vc_font.height;
                vc_resize(vc, cols, rows);
-
-               if (CON_IS_VISIBLE(vc)) {
-                       updatescrollmode(p, info, vc);
-                       scrollback_max = 0;
-                       scrollback_current = 0;
-
-                       if (!fbcon_is_inactive(vc, info)) {
-                           ops->var.xoffset = ops->var.yoffset =
-                               p->yscroll = 0;
-                           ops->update_start(info);
-                       }
-
-                       fbcon_set_palette(vc, color_table);
-                       update_screen(vc);
-                       if (softback_buf)
-                               fbcon_update_softback(vc);
-               }
        }
 
-       ops->p = &fb_display[ops->currcon];
+       if (fg != -1)
+               fbcon_modechanged(info);
 }
 
 static int fbcon_mode_deleted(struct fb_info *info,