[PATCH] sata_mv: fix timeouts on lower ports of 508x/6081 chips

[Mark Lord <liml@rtr.ca>]

Fix a longstanding bug for the 8-port Marvell Sata controllers (508x/6081),
where accesses to the upper 4 ports would cause lost-interrupts / timeouts
for the lower 4-ports.  With this patch, the 6081 boards should finally be
reliable enough for mainstream use with Linux.

This patch is for 2.6.29, but should also get reviewed/released
for the -stable branches of 2.6.28, 2.6.27, and 2.6.26.

Signed-off-by: Mark Lord <mlord@pobox.com>

--- linux-2.6.29-rc1-git6/drivers/ata/sata_mv.c	2009-01-16 11:11:16.000000000 -0500
+++ linux/drivers/ata/sata_mv.c	2009-01-16 11:52:17.000000000 -0500
@@ -883,7 +883,7 @@
 		struct mv_host_priv *hpriv = ap->host->private_data;
 		int hardport = mv_hardport_from_port(ap->port_no);
 		void __iomem *hc_mmio = mv_hc_base_from_port(
-					mv_host_base(ap->host), hardport);
+					mv_host_base(ap->host), ap->port_no);
 		u32 hc_irq_cause, ipending;
 
 		/* clear EDMA event indicators, if any */