tree 54188630bb30858acf409df5bd07b7f31bf575ec
parent 61d79a8eb362f826a002d3d14c4f9a070a818542
author Martin K. Petersen <martin.petersen@oracle.com> 1242362435 -0400
committer Jeff Garzik <jgarzik@redhat.com> 1242411296 -0400

libata: Media rotation rate and form factor heuristics

This patch provides new heuristics for parsing both the form factor and
media rotation rate ATA IDENFITY words.

The reported ATA version must be 7 or greater and the device must return
values defined as valid in the standard.  Only then are the
characteristics reported to SCSI via the VPD B1 page.

This seems like a reasonable compromise to me considering that we have
been shipping several kernel releases that key off the rotation rate bit
without any version checking whatsoever.  With no complaints so far.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>