One of the fixing commits for CVE-2021-33655, commit 159a96b199b4
("fbcon: Prevent that screen size is smaller than font size")
introduced a redundant lock_fb_info line into the ioctl flow in fbmem.c.
This causes a deadlock when calling FBIOPUT_VSCREENINFO ioctl.
Remove problematic lock_fb_info call.
Signed-off-by: Cengiz Can <email address hidden>
Acked-by: Thadeu Lima de Souza Cascardo <email address hidden>
Acked-by: Cory Todd <email address hidden>
Acked-by: Tim Gardner <email address hidden>
Signed-off-by: Tim Gardner <email address hidden>