[PATCH v3 09/21] powerpc/eeh: Delay probing EEH device during hotplug

[Gavin Shan]

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. So we have to delay probing EEH devices for PowerNV platform
until that point.

Fixes: 1c509148b ("powerpc/eeh: Do probe on pci_dn")
Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
---
 arch/powerpc/kernel/eeh.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index c63d1eb..b5847dc 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1056,6 +1056,9 @@ 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 ||
@@ -1105,6 +1108,10 @@ void eeh_add_device_late(struct pci_dev *dev)
 
 	pdn = pci_get_pdn_by_devfn(dev->bus, dev->devfn);
 	edev = pdn_to_eeh_dev(pdn);
+	if (eeh_has_flag(EEH_PROBE_MODE_DEV))
+		eeh_ops->probe(pdn, NULL);
+
+	/* Check if PCI device and EEH device has been bound */
 	if (edev->pdev == dev) {
 		pr_debug("EEH: Already referenced !\n");
 		return;
-- 
2.1.0