The frambuffer console is still writing to the graphics hardware even if the
hardware is not owned anymore by the console.  This can lead to crashes with
some hardware.

A trace of the source indicates that it comes from almost anywhere, anytime.

The fix is to return immediately if vc_mode != KD_TEXT.  The test is placed in
the following functions if not already present.

fbcon_cursor()
fbcon_putcs()
fbcon_clear()
fbcon_bmove()
fbcon_blank()
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>