From d91dafc02f42e23c1a906202ebde5d7c49ef058d Mon Sep 17 00:00:00 2001
From: Gavin Shan <gwshan@linux.vnet.ibm.com>
Date: Fri, 1 May 2015 09:22:15 +1000
Subject: [PATCH] powerpc/eeh: Delay probing EEH device during hotplug
Commit 1c509148b ("powerpc/eeh: Do probe on pci_dn") probes EEH
devices in early stage, which is reasonable to pSeries platform.
However, it's wrong for PowerNV platform because the PE# isn't
determined until the resources (IO and MMIO) are assigned to
PE in hotplug case. So we have to delay probing EEH devices
for PowerNV platform until the PE# is assigned.
Fixes: ff57b454ddb9 ("powerpc/eeh: Do probe on pci_dn")
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/kernel/eeh.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index fa046ca6d0fa6a..9ee61d15653d6e 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1061,6 +1061,9 @@ void eeh_add_device_early(struct pci_dn *pdn)
if (!edev || !eeh_enabled())
return;
+ if (!eeh_has_flag(EEH_PROBE_MODE_DEVTREE))
+ return;
+
/* USB Bus children of PCI devices will not have BUID's */
phb = edev->phb;
if (NULL == phb ||
@@ -1115,6 +1118,9 @@ void eeh_add_device_late(struct pci_dev *dev)
return;
}
+ if (eeh_has_flag(EEH_PROBE_MODE_DEV))
+ eeh_ops->probe(pdn, NULL);
+
/*
* The EEH cache might not be removed correctly because of
* unbalanced kref to the device during unplug time, which
--
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