[SCSI] hptiop: fix RR312x in hosts with >12GB
As the limitation of RR312x's dma engine, the HBA can not access host memory over 12GB. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=14311 [alan: resurrected bug from 2009 and pushed upstream] Reported-by: NAlan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: NHighPoint Linux Team <linux@highpoint-tech.com> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
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