From: John Feeney <jfeeney@redhat.com>
Date: Fri, 26 Jun 2009 13:20:09 -0400
Subject: [ide] enable VX800 to use UDMA mode
Message-id: 4A450349.4040702@redhat.com
O-Subject: [RHEL5.4 PATCH] enable VX800 to use UDMA mode
Bugzilla: 504121
RH-Acked-by: Chuck Ebbert <cebbert@redhat.com>
RH-Acked-by: David Milburn <dmilburn@redhat.com>

bz504121
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=504121
RHEL5.3 long installation time and low hard disk performance
in VX800 platform

Description of problem:
Slow performance due to not using device capable of using UDMA.

Solution:
The pci ids for the VX800 bridge and the 5324 device need to be
added to via82cxxx.c.

Upstream status:
vx800 add new VIA bridge to VIA PATA drivers - Josepch Chan
  - adds vx800
  commit b311ec4ae82b1dc337689e966dcf9c5f6a53877e

vt8237s  correct PCI_DEVICE_ID_VIA_SATA_EIDE ID
  - Josepch Chan - adds EIDE to pci-ids.h and via82cxxxx.c
  commit e0b874df14052489e6408125903dba96b4dd7baa

NOTE: Given this is an exception to RHEL-5.4, only the specific
lines of code that fixed the problem for the VX800 were included so
as to minimize destabilization.

Brew:
Successfully built in Brew (task_1862333)

Testing:
VIA provided the patch and successfully did the testing with the
Brew built rpm.

Acks would be appreciated. Thanks.

diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index 9b7589e..3cf5857 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -78,6 +78,7 @@ static struct via_isa_bridge {
 	u8 rev_max;
 	u16 flags;
 } via_isa_bridges[] = {
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
@@ -498,6 +499,7 @@ static struct pci_device_id via_pci_tbl[] = {
 	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_6410,     PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_5324,     PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 98cf867..ca982e1 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1351,6 +1351,7 @@
 #define PCI_DEVICE_ID_VIA_8231		0x8231
 #define PCI_DEVICE_ID_VIA_8231_4	0x8235
 #define PCI_DEVICE_ID_VIA_8365_1	0x8305
+#define PCI_DEVICE_ID_VIA_5324		0x5324
 #define PCI_DEVICE_ID_VIA_CX700		0x8324
 #define PCI_DEVICE_ID_VIA_VX800		0x8353
 #define PCI_DEVICE_ID_VIA_8371_1	0x8391