[Bug 81140] [HSW/BYT/BDW Bisected ]system sporadically boot fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81140

--- Comment #12 from liulei <lei.a.liu at intel.com> ---
My simply debug as below, 
With bad commit, below file will go to wrong place.
(-fixes branch: 92ae62076957c5904509f755eea0075ad60f74c6)
drivers/video/fbdev/core/fbmem.c line:1696

function "static int do_unregister_framebuffer(struct fb_info *fb_info)"
will return -EINVAL, because of this line code:
if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) 
more detail: it is "registered_fb[i] != fb_info" cause function return -EINVAL

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