[ 3.5.y.z extended stable ] Patch "ata_piix: Fix DVD not dectected at some Haswell platforms" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ata_piix: Fix DVD not dectected at some Haswell platforms

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 6babd5d69d15bbe67e8ae038966b1530dd1ed542 Mon Sep 17 00:00:00 2001
From: Youquan Song <youquan.song at intel.com>
Date: Wed, 6 Mar 2013 10:49:05 -0500
Subject: [PATCH] ata_piix: Fix DVD not dectected at some Haswell platforms

commit b55f84e2d527182e7c611d466cd0bb6ddce201de upstream.

There is a quirk patch 5e5a4f5d5a08c9c504fe956391ac3dae2c66556d
"ata_piix: make DVD Drive recognisable on systems with Intel Sandybridge
 chipsets(v2)" fixing the 4 ports IDE controller 32bit PIO mode.

We've hit a problem with DVD not recognized on Haswell Desktop platform which
includes Lynx Point 2-port SATA controller.

This quirk patch disables 32bit PIO on this controller in IDE mode.

v2: Change spelling error in statememnt pointed by Sergei Shtylyov.
v3: Change comment statememnt and spliting line over 80 characters pointed by
    Libor Pechacek and also rebase the patch against 3.8-rc7 kernel.

Tested-by: Lee, Chun-Yi <jlee at suse.com>
Signed-off-by: Youquan Song <youquan.song at intel.com>
Signed-off-by: Jeff Garzik <jgarzik at redhat.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/ata/ata_piix.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index fe5973f..a382b7c 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -150,6 +150,7 @@ enum piix_controller_ids {
 	tolapai_sata,
 	piix_pata_vmw,			/* PIIX4 for VMware, spurious DMA_ERR */
 	ich8_sata_snb,
+	ich8_2port_sata_snb,
 };

 struct piix_map_db {
@@ -326,7 +327,7 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	/* SATA Controller IDE (Lynx Point) */
 	{ 0x8086, 0x8c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
 	/* SATA Controller IDE (Lynx Point) */
-	{ 0x8086, 0x8c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+	{ 0x8086, 0x8c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
 	/* SATA Controller IDE (Lynx Point) */
 	{ 0x8086, 0x8c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
 	/* SATA Controller IDE (Lynx Point-LP) */
@@ -519,6 +520,7 @@ static const struct piix_map_db *piix_map_db_table[] = {
 	[ich8m_apple_sata]	= &ich8m_apple_map_db,
 	[tolapai_sata]		= &tolapai_map_db,
 	[ich8_sata_snb]		= &ich8_map_db,
+	[ich8_2port_sata_snb]	= &ich8_2port_map_db,
 };

 static struct ata_port_info piix_port_info[] = {
@@ -660,6 +662,15 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},

+	[ich8_2port_sata_snb] =
+	{
+		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR
+					| PIIX_FLAG_PIO16,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA6,
+		.port_ops	= &piix_sata_ops,
+	},
 };

 static struct pci_bits piix_enable_bits[] = {
--
1.8.1.2