vfio-ccw: Check initialized flag in cp_init()

We have a really nice flag in the channel_program struct that
indicates if it had been initialized by cp_init(), and use it
as a guard in the other cp accessor routines, but not for a
duplicate call into cp_init(). The possibility of this occurring
is low, because that flow is protected by the private->io_mutex
and FSM CP_PROCESSING state. But then why bother checking it
in (for example) cp_prefetch() then?

Let's just be consistent and check for that in cp_init() too.

Fixes: 71189f263f8a3 ("vfio-ccw: make it safe to access channel programs")
Signed-off-by: Eric Farman <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Acked-by: Matthew Rosato <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>

0 files changed, 0 insertions, 0 deletions