fbcon: when font is freed, clear also vc_font.data

commit ae1287865f5361fa138d4d3b1b6277908b54eac9
Author: Dave Airlie <airlied@redhat.com>
Date:   Thu Jan 24 16:12:41 2013 +1000

    fbcon: don't lose the console font across generic->chip driver switch

uses a pointer in vc->vc_font.data to load font into the new driver.
However if the font is actually freed, we need to clear the data
so that we don't reload font from dangling pointer.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=892340
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 3cd6759278269d837b444749192fb841521cfcbd..a92783e480e66b60755dc0dcc3052d2d75d17fe1 100644 (file)
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -1228,6 +1228,8 @@ static void fbcon_deinit(struct vc_data *vc)
 finished:
 
        fbcon_free_font(p, free_font);
+       if (free_font)
+               vc->vc_font.data = NULL;
 
        if (!con_is_bound(&fb_con))
                fbcon_exit();