ENGR00321817-02 fbcon: System hang when calling fb_new_modelist()

System will hang if calling fb_new_modelist() function from mxc_hdmi
driver.

In the function of fbcon_new_modelist(), pointer variable vc is missing
null pointer check, add null pointer check vc to fix the issue.

Signed-off-by: Sandor Yu <R01008@freescale.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index a92783e480e6..4a42cc56d4b2 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -3208,6 +3208,8 @@ static void fbcon_new_modelist(struct fb_info *info)
                 if (!fb_display[i].mode)
                         continue;
                 vc = vc_cons[i].d;
+                if (!vc)
+                        continue;
                 display_to_var(&var, &fb_display[i]);
                 mode = fb_find_nearest_mode(fb_display[i].mode,
                                             &info->modelist);