> ata_interrupt checks qc->tf.ctl & ATA_NIEN
>
> Other functions set/reset nIEN in the tf they issue then directly call
> ata_tf_load/ata_exec_* so I don't believe qc->tf.ctl is the correct
> thing to check for non-interrupt status on older type controllers at
> least.
>
> Instead you need to look at ap->last_ctl. But that too looks suspect if
> any kind of reset sets it back to an undefined state.
>
Just tried that, and it doesnt help. Doesnt change behaviour, at least for
my problem.
> Finally I don't see what locks viewing ->tf.ctl/->last_ctl against
> whether it has yet been loaded into the hardware.
>
> Alan
>
Thanks.
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