Re: [PATCH] fbcon: fix locking harder

On Thu, Jan 24, 2013 at 8:43 PM, Dave Airlie [off-list ref] wrote:

Okay so Alan's patch handled the case where there was no registered fbcon,
however the other path entered in set_con2fb_map pit.

In there we called fbcon_takeover, but we also took the console lock in a couple
of places. So push the console lock out to the callers of set_con2fb_map,

this means fbmem and switcheroo needed to take the lock around the fb notifier
entry points that lead to this.

This should fix the efifb regression seen by Maarten.

Signed-off-by: Dave Airlie <airlied@redhat.com>

Linus might not be taking this for 3.8 because of lack of testing, but
that doesn't mean the problems don't exist in 3.8 (and older).  Maybe
throw a CC for stable on the patch?  That way it works its way back when
it does get merged.

josh