[ 3.5.y.z extended stable ] Patch "ARM: Kirkwood: Update PCI-E fixup" has been added to staging queue

[Herton Ronaldo Krzesinski]

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

    ARM: Kirkwood: Update PCI-E fixup

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.
-Herton

------

>From d0323a03313a42a5a2732fda6f418e2e8bda2b09 Mon Sep 17 00:00:00 2001
From: Jason Gunthorpe <jgunthorpe at obsidianresearch.com>
Date: Wed, 21 Nov 2012 00:19:06 -0700
Subject: [PATCH] ARM: Kirkwood: Update PCI-E fixup

commit 1dc831bf53fddcc6443f74a39e72db5bcea4f15d upstream.

- The code relies on rc_pci_fixup being called, which only happens
  when CONFIG_PCI_QUIRKS is enabled, so add that to Kconfig. Omitting
  this causes a booting failure with a non-obvious cause.
- Update rc_pci_fixup to set the class properly, copying the
  more modern style from other places
- Correct the rc_pci_fixup comment

Signed-off-by: Jason Gunthorpe <jgunthorpe at obsidianresearch.com>
Signed-off-by: Jason Cooper <jason at lakedaemon.net>
[ herton: adjust context ]
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 arch/arm/Kconfig              |    1 +
 arch/arm/mach-kirkwood/pcie.c |   11 ++++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 72fd2bd..aca782f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -548,6 +548,7 @@ config ARCH_KIRKWOOD
 	bool "Marvell Kirkwood"
 	select CPU_FEROCEON
 	select PCI
+	select PCI_QUIRKS
 	select ARCH_REQUIRE_GPIOLIB
 	select GENERIC_CLOCKEVENTS
 	select NEED_MACH_IO_H
diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c
index 6e8b2ef..f3f55b2 100644
--- a/arch/arm/mach-kirkwood/pcie.c
+++ b/arch/arm/mach-kirkwood/pcie.c
@@ -225,14 +225,19 @@ static int __init kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
 	return 1;
 }

+/*
+ * The root complex has a hardwired class of PCI_CLASS_MEMORY_OTHER, when it
+ * is operating as a root complex this needs to be switched to
+ * PCI_CLASS_BRIDGE_HOST or Linux will errantly try to process the BAR's on
+ * the device. Decoding setup is handled by the orion code.
+ */
 static void __devinit rc_pci_fixup(struct pci_dev *dev)
 {
-	/*
-	 * Prevent enumeration of root complex.
-	 */
 	if (dev->bus->parent == NULL && dev->devfn == 0) {
 		int i;

+		dev->class &= 0xff;
+		dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
 		for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 			dev->resource[i].start = 0;
 			dev->resource[i].end   = 0;
--
1.7.9.5