[ 3.8.y.z extended stable ] Patch "powerpc/eeh: Fix fetching bus for single-dev-PE" has been added to staging queue

[Luis Henriques]

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

    powerpc/eeh: Fix fetching bus for single-dev-PE

to the linux-3.8.y-queue branch of the 3.8.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-3.8.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 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 0d2fb6f0c1cfc2cbc60863e8f4cbb1361c208ea0 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw at linux.vnet.ibm.com>
Date: Wed, 5 Jun 2013 15:34:02 +0800
Subject: [PATCH] powerpc/eeh: Fix fetching bus for single-dev-PE

commit 5fb621698e94e3af8b413d9439041fde48e2784d upstream.

While running Linux as guest on top of phyp, we possiblly have
PE that includes single PCI device. However, we didn't return
its PCI bus correctly and it leads to failure on recovery from
EEH errors for single-dev-PE. The patch fixes the issue.

Cc: Steve Best <sbest at us.ibm.com>
Signed-off-by: Gavin Shan <shangw at linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 arch/powerpc/platforms/pseries/eeh_pe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/eeh_pe.c b/arch/powerpc/platforms/pseries/eeh_pe.c
index fe43d1a..9d4a9e8 100644
--- a/arch/powerpc/platforms/pseries/eeh_pe.c
+++ b/arch/powerpc/platforms/pseries/eeh_pe.c
@@ -639,7 +639,8 @@ struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe)

 	if (pe->type & EEH_PE_PHB) {
 		bus = pe->phb->bus;
-	} else if (pe->type & EEH_PE_BUS) {
+	} else if (pe->type & EEH_PE_BUS ||
+		   pe->type & EEH_PE_DEVICE) {
 		edev = list_first_entry(&pe->edevs, struct eeh_dev, list);
 		pdev = eeh_dev_to_pci_dev(edev);
 		if (pdev)
--
1.8.1.2