Tejun Heo wrote:
Hmmm.. The drive is issuing SDB FIS which completes already completed tags. This could be dangerous. Depending on timing, it might end up finishing a command which occupied the slot which hasn't been processed yet. If a drive does this, NCQ shouldn't be enabled for it. Can you post full boot dmesg?
I'm not sure the data supports that conclusion? PORT_IRQ_SDB_FIS is quite normal and expected during NCQ operation, if that interrupt is enabled. Just normal SDB:Entry and SDB:SetIntr states.
Side note: looking at those states reminds me that ATAPI devices that support Asynchronous Notification (an end to CD-ROM polling) will soon be appearing on the market. We'll need to make note of the Notification bit, if present...
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