libata: handle SEMB signature better
WDC WD1600JS-62MHB5 successfully hits the window between ATA/ATAPI-7 and Serial ATA II standards and reports 3c/c3 signature which now is assigned to SEMB. Make ata_dev_classify() report ATA_DEV_SEMB on the sig and let ata_dev_read_id() work around it by trying IDENTIFY once. This fixes bko#11579. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NDavid Haun <drhaun88@gmail.com> Reported-by: NLars Wirzenius <liw@liw.fi> Reported-by: NJuan Manuel <jmcarranza@gmail.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
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