cciss: clean up code in cciss_shutdown
cciss: clean up code in cciss_shutdown. Send the flush cache command down with interrupts still enabled, and do not do DMA from the stack. Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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