tree fd0a4a8df9eec8b22d1ea9f18443dfc2e32e80eb
parent 065d9cac98a5406ecd5a1368f8fd38f55739dee9
author Jeff Garzik <jgarzik@pobox.com> 1126864908 -0400
committer Jeff Garzik <jgarzik@pobox.com> 1126864908 -0400

[libata] fix PIO completion race

Make sure we that completion is the final action we take; prior to this
change, another CPU may have changed ap->pio_task_state before we tested
it a final time.

Spotted by, and original patch by Albert Lee @ IBM.

Also includes a minor optimization:  eliminate a ton of unnecessary
queue_work() calls, simply by jumping to the beginning of the FSM
function ata_pio_task().