fbcon: fix situation where fbcon gets deinitialised and can't reinit.
authorDave Airlie <airlied@redhat.com>
Tue, 21 Dec 2010 01:41:17 +0000 (01:41 +0000)
committerPaul Mundt <lethal@linux-sh.org>
Tue, 22 Mar 2011 08:22:19 +0000 (17:22 +0900)
commit32b98bf8752c5483481f77d48934aba26c967fcd
tree4c06935ff1b8d6393802a38635377a0d34149187
parent4295f9bf74a885da390abc49a3b42a011c1bb890
fbcon: fix situation where fbcon gets deinitialised and can't reinit.

Situation as follow:
2 GPUs + vesafb + kms.

GPU 1 is primary, vesafb binds to it as fb0
radeon loads
GPU 0 loads as fb1
GPU 1 loads, vesafb gets kicked off which causes fb0 to unbind
console, which causes the dummy console to rebind.

this means fbcon_deinit gets called, which calls fbcon_exit
since the console isn't bound anymore and we set fbcon_has_exited.

GPU 1 creates a new fb0 which is primary and we want to be console.
fbcon_fb_registered gets called sets the primary up and calls set_con2fb_map,
however as fbcon_has_exited is set nothing further ever happens.

This patch bypasses the fbcon_has_exited and checks if the console is unbound,
if its unbound it calls the fbcon_takeover which calls the vt layer to
call the fbcon_startup method and everthing works.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
drivers/video/console/fbcon.c