[3.11.y.z extended stable] Patch "powerpc/powernv: Reset root port in firmware" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Fri May 30 09:28:46 UTC 2014

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

    powerpc/powernv: Reset root port in firmware

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:


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

For more information about the 3.11.y.z tree, see



>From aad5b440c5f94f917bec721725e1bd011c38b761 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gwshan at linux.vnet.ibm.com>
Date: Thu, 24 Apr 2014 18:00:22 +1000
Subject: powerpc/powernv: Reset root port in firmware

commit 372cf1244d7c271806b83b32b09a1c8b1b31b353 upstream.

Resetting root port has more stuff to do than that for PCIe switch
ports and we should have resetting root port done in firmware instead
of the kernel itself. The problem was introduced by commit 5b2e198e
("powerpc/powernv: Rework EEH reset").

Signed-off-by: Gavin Shan <gwshan 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/powernv/eeh-ioda.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index d972157b1e17..3dfcfa164ebb 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -500,7 +500,8 @@ static int ioda_eeh_reset(struct eeh_pe *pe, int option)
 		ret = ioda_eeh_phb_reset(hose, option);
 	} else {
 		bus = eeh_pe_bus_get(pe);
-		if (pci_is_root_bus(bus))
+		if (pci_is_root_bus(bus) ||
+		    pci_is_root_bus(bus->parent))
 			ret = ioda_eeh_root_reset(hose, option);
 			ret = ioda_eeh_bridge_reset(hose, bus->self, option);

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