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Commit c6c82e0c authored by Eric Farman's avatar Eric Farman Committed by Cornelia Huck
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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: 71189f26 ("vfio-ccw: make it safe to access channel programs")
Signed-off-by: default avatarEric Farman <farman@linux.ibm.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Acked-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20210511195631.3995081-2-farman@linux.ibm.com>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent 6efb943b
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