>Note that the interrupt service routine should also be
>grabbing io_request_lock when the interrupt arrives, and releasing it before
>the interrupt service routine returns. Thus when the error handler thread
>wakes up from the sleep (as a result of either a timer firing or an
>interrupt), the error handler function would need to grab io_request_lock
>again.
Please don't encourage this. The only requirement is that the io_request_lock
be held during calls back into the mid-layer. Holding the io_request_lock
during the whole interrupt routine needlessly prevents multiple controller
instances (not necessarily of the type serviced by your driver) from running
at the same time.
--
Justin
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