[Ocf-linux-users] question about the awaking condition of crypto_proc()

[Chia-Chih Wu <wuc...@gm...>]

Hi there,

I have a question about the condition of wait_event_interruptible() in
crypto_proc().

The condition in 2009-09-01 release is:
10507 +           wait_event_interruptible(cryptoproc_wait,
10508 +                   !(list_empty(&crp_q) || crypto_all_qblocked) ||
10509 +                   !(list_empty(&crp_kq) || crypto_all_kqblocked) ||
10510 +                   cryptoproc == (pid_t) -1);

crypto_all_qblocked is a global integer which has the value of
!list_empty(&crp_q). It would not be modified during the sleeping period of
crypto_proc(). If crypto_all_qblocked is true (e.g. crp_q is not empty but
no driver is available) and no more operations go into crypto_dispatch(),
the condition will be always false. Who can awake crypto_proc() kernel
thread in this case?

        - ccwu