Mark Lord wrote:
sata_mv Introduce per-tag SG tables.

In preparation for supporting NCQ, we must allocate separate SG tables
for each command tag, rather than just a single table per port as before.

Gen-I hardware cannot do NCQ, though, so we still allocate just a single
table for that, but populate it in all 32 slots to avoid special-cases
elsewhere in hotter paths of the code.

Signed-off-by: Mark Lord <[EMAIL PROTECTED]>

ACK (though it obviously must be revised per comments on patch #10)

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