[Bug 72765] [ivb efi] Switching from efifb to i915.ko causes a hard hang with fbcon=vc:2-6

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72765

--- Comment #13 from Chris Wilson <chris at chris-wilson.co.uk> ---
Code review says it is still buggy, e.g.:

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index ea437245562e..90979e32bf4a 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -368,7 +368,7 @@ static void fbcon_update_softback(struct vc_data *vc)
 static void fb_flashcursor(struct work_struct *work)
 {
        struct fb_info *info = container_of(work, struct fb_info, queue);
-       struct fbcon_ops *ops = info->fbcon_par;
+       struct fbcon_ops *ops;
        struct vc_data *vc = NULL;
        int c;
        int mode;
@@ -381,6 +381,7 @@ static void fb_flashcursor(struct work_struct *work)
        if (ret == 0)
                return;

+       ops = info->fbcon_par;
        if (ops && ops->currcon != -1)
                vc = vc_cons[ops->currcon].d;

has a similar unbind race as the original bug.

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