[PATCH] vt: Delay the update of the visible console

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>

1 files changed, 17 insertions, 9 deletions

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 6c94879e0b99..eb27eed48a86 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -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();