From: Petr Vandrovec <petr@vandrovec.name>
Date: Fri, 20 Jul 2007 11:44:44 +0000 (-0400)
Subject: [libata] Fix reported task file values in sense data
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fe36cb53cfd82f3c0796a0826e1c9caf198c8f97;p=openwrt%2Fstaging%2Fblogic.git

[libata] Fix reported task file values in sense data

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>
---

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 1190c6703bc4..6c289c7b1322 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -211,6 +211,8 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 		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;
 	}
 }
 
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index c0ffbed3e75d..36cdbd2b0bd5 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -363,6 +363,8 @@ static void scc_tf_read (struct ata_port *ap, struct ata_taskfile *tf)
 		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;
 	}
 }