releases/2.6.22.2/fix-reported-task-file-values-in-sense-data.patch

From fe36cb53cfd82f3c0796a0826e1c9caf198c8f97 Mon Sep 17 00:00:00 2001
From: Petr Vandrovec <petr@vandrovec.name>
Date: Fri, 20 Jul 2007 07:44:44 -0400
Subject: [PATCH] [libata] Fix reported task file values in sense data

From: Petr Vandrovec <petr@vandrovec.name>

ata_tf_read was setting HOB bit when lba48 command was submitted, but
was not clearing it before reading "normal" data.  As it is only place
which sets HOB bit in control register, and register reads should not
be affected by other bits, let's just clear it when we are done with
reading upper bytes so non-48bit commands do not have to touch ctl
at all.

pata_scc suffered from same problem...

Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/ata/libata-sff.c |    2 ++
 drivers/ata/pata_scc.c   |    2 ++
 2 files changed, 4 insertions(+)

--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -211,6 +211,8 @@ void ata_tf_read(struct ata_port *ap, st
 		tf->hob_lbal = ioread8(ioaddr->lbal_addr);
 		tf->hob_lbam = ioread8(ioaddr->lbam_addr);
 		tf->hob_lbah = ioread8(ioaddr->lbah_addr);
+		iowrite8(tf->ctl, ioaddr->ctl_addr);
+		ap->last_ctl = tf->ctl;
 	}
 }
 
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -352,6 +352,8 @@ static void scc_tf_read (struct ata_port
 		tf->hob_lbal = in_be32(ioaddr->lbal_addr);
 		tf->hob_lbam = in_be32(ioaddr->lbam_addr);
 		tf->hob_lbah = in_be32(ioaddr->lbah_addr);
+		out_be32(ioaddr->ctl_addr, tf->ctl);
+		ap->last_ctl = tf->ctl;
 	}
 }