[PATCH] vt: Delay the update of the visible console
authorDavid Hollister <david.hollister@amd.com>
Mon, 26 Jun 2006 07:26:41 +0000 (00:26 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 26 Jun 2006 16:58:30 +0000 (09:58 -0700)
Delay the update of the visible framebuffer console until all other consoles
have been initialized in order to avoid losing information.  This only seems
to be a problem with modules, not with built-in drivers.

Signed-off-by: David Hollister <david.hollister@amd.com>
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/char/vt.c

index 6c94879..eb27eed 100644 (file)
@@ -2665,7 +2665,7 @@ int __init vty_init(void)
 
 int take_over_console(const struct consw *csw, int first, int last, int deflt)
 {
-       int i, j = -1;
+       int i, j = -1, k = -1;
        const char *desc;
        struct module *owner;
 
@@ -2701,8 +2701,11 @@ int take_over_console(const struct consw *csw, int first, int last, int deflt)
                        continue;
 
                j = i;
-               if (CON_IS_VISIBLE(vc))
+               if (CON_IS_VISIBLE(vc)) {
+                       k = i;
                        save_screen(vc);
+               }
+
                old_was_color = vc->vc_can_do_color;
                vc->vc_sw->con_deinit(vc);
                vc->vc_origin = (unsigned long)vc->vc_screenbuf;
@@ -2718,18 +2721,23 @@ int take_over_console(const struct consw *csw, int first, int last, int deflt)
                 */
                if (old_was_color != vc->vc_can_do_color)
                        clear_buffer_attributes(vc);
-
-               if (CON_IS_VISIBLE(vc))
-                       update_screen(vc);
        }
+
        printk("Console: switching ");
        if (!deflt)
                printk("consoles %d-%d ", first+1, last+1);
-       if (j >= 0)
+       if (j >= 0) {
+               struct vc_data *vc = vc_cons[j].d;
+
                printk("to %s %s %dx%d\n",
-                      vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
-                      desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
-       else
+                      vc->vc_can_do_color ? "colour" : "mono",
+                      desc, vc->vc_cols, vc->vc_rows);
+
+               if (k >= 0) {
+                       vc = vc_cons[k].d;
+                       update_screen(vc);
+               }
+       } else
                printk("to %s\n", desc);
 
        release_console_sem();