Hi,
I'm consistently and constantly hitting a deadlock.
console_callback in drivers/tty/vt/vt.c does: console_lock() and then calls:
do_blank_screen, which calls:
vc->vc_sw->con_blank(..) which can be a pointer to the function:
fbcon_blank in video/console/fbcon.c. This is missing a
WARN_CONSOLE_UNLOCKED. This calls:
fbcon_generic_blank which does lock_fb_info(info)
So we have a console_lock() followed by a lock_fb_info(info).
Now if while that is running, we have an ioctl call:
do_fb_ioctl in drivers/video/fbmem.c which does:
if (!lock_fb_info(info))
return -ENODEV;
console_lock();
So it tries to acquire the same locks in the reverse order. This
deadlocks consistently for me.
(I'm also curious why I'm hitting this continually, when everyone else
seems to be okay.)
I understand that this is really difficult to fix, but if anyone has
even a suggestion on how to hack it to make it work for me, I'd be
very grateful.
Thank you,
John Tapsell
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