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>pm_send</SPAN
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><H2
>Name</H2
>pm_send -- send request to a single device
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><CODE
><CODE
CLASS="FUNCDEF"
>int <TT
CLASS="FUNCTION"
>pm_send </TT
></CODE
>(struct pm_dev * <TT
CLASS="PARAMETER"
><I
>dev</I
></TT
>, pm_request_t <TT
CLASS="PARAMETER"
><I
>rqst</I
></TT
>, void * <TT
CLASS="PARAMETER"
><I
>data</I
></TT
>);</CODE
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>Arguments</H2
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><DL
><DT
><TT
CLASS="PARAMETER"
><I
>dev</I
></TT
></DT
><DD
><P
> device to send to
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>rqst</I
></TT
></DT
><DD
><P
> power management request
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>data</I
></TT
></DT
><DD
><P
> data for the callback
</P
></DD
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><H2
>Description</H2
><P
> Issue a power management request to a given device. The
<TT
CLASS="CONSTANT"
>PM_SUSPEND</TT
> and <TT
CLASS="CONSTANT"
>PM_RESUME</TT
> events are handled specially. The
data field must hold the intended next state. No call is made
if the state matches.
</P
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><H2
>BUGS</H2
><P
> what stops two power management requests occuring in parallel
and conflicting.
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></A
><H2
>WARNING</H2
><P
> Calling pm_send directly is not generally recommended, in
paticular there is no locking against the pm_dev going away. The
caller must maintain all needed locking or have 'inside knowledge'
on the safety. Also remember that this function is not locked against
pm_unregister. This means that you must handle SMP races on callback
execution and unload yourself.
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