>Well the driver isnt allowed to hold interrupts off for > 1 tick because
>that messes up the clock, and at 1 second the watchdog nmi will reboot
>
>scsi driver authors therefore need to adjust their drivers
If you ask me, it is a bug that the io_request lock is forced on low
level drivers at all. 90% of the aic7xxx driver pretends that the
io_request_lock doesn't exist, relying instead on a per-controller instance
lock. The interrupt handler only aquires the io_request lock for calls back
into the mid-layer as it is expected to be held (although the mid-layer
almost instantly releases it again). I also immediately release the
io_request_lock in all of my error recovery entry points because I don't
need the protection and, as you say, we can't lock up the system while we're
waiting for recovery actions to complete.
--
Justin
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