Matching on the ata port number, which is an attribute that is not a direct ancestor

Matching on the ata port number, which is an attribute that is not a direct ancestor

[Phillip Susi]

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I am trying to figure out how to set up a rule, preferably using
information stored in the hwdb, to identify ata ports that are known
to be esata on specific hardware.  The problem seems to be that ata
exposes this information not in a direct ancestor of the block device
node, but off to the side.  For example, the block node is:

/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0

But the ata port number is exposed in the attribute:

/devices/pci0000:00/0000:00:1f.2/ata1/ata_port/ata1/port_no

So how can I write a udev rule to match on a specific port_no, and
then add in the modalias for this specific controller?

Matching on ATTRS{ata_port/ata1/port_no} doesn't seem to work.

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