[PATCH] USB: S3C24XX port numbering fix

[linux-2.6] / drivers / char / vt.c

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 665103ccaee83b69b6ca30a7fda0f40eec8983f7..b8d0c290b0dbf137152a03d3a992ad07e308738a 100644 (file)
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -434,21 +434,25 @@ void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
 /* used by selection: complement pointer position */
 void complement_pos(struct vc_data *vc, int offset)
 {
-       static unsigned short *p;
+       static int old_offset = -1;
        static unsigned short old;
        static unsigned short oldx, oldy;
 
        WARN_CONSOLE_UNLOCKED();
 
-       if (p) {
-               scr_writew(old, p);
+       if (old_offset != -1 && old_offset >= 0 &&
+           old_offset < vc->vc_screenbuf_size) {
+               scr_writew(old, screenpos(vc, old_offset, 1));
                if (DO_UPDATE(vc))
                        vc->vc_sw->con_putc(vc, old, oldy, oldx);
        }
-       if (offset == -1)
-               p = NULL;
-       else {
+
+       old_offset = offset;
+
+       if (offset != -1 && offset >= 0 &&
+           offset < vc->vc_screenbuf_size) {
                unsigned short new;
+               unsigned short *p;
                p = screenpos(vc, offset, 1);
                old = scr_readw(p);
                new = old ^ vc->vc_complement_mask;
@@ -459,6 +463,7 @@ void complement_pos(struct vc_data *vc, int offset)
                        vc->vc_sw->con_putc(vc, new, oldy, oldx);
                }
        }
+
 }
 
 static void insert_char(struct vc_data *vc, unsigned int nr)
@@ -2272,7 +2277,9 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
                        ret = paste_selection(tty);
                        break;
                case TIOCL_UNBLANKSCREEN:
+                       acquire_console_sem();
                        unblank_screen();
+                       release_console_sem();
                        break;
                case TIOCL_SELLOADLUT:
                        ret = sel_loadlut(p);
@@ -2317,8 +2324,10 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
                        }
                        break;
                case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
+                       acquire_console_sem();
                        ignore_poke = 1;
                        do_blank_screen(0);
+                       release_console_sem();
                        break;
                case TIOCL_BLANKEDSCREEN:
                        ret = console_blanked;