From 26a74850b35d85a81155aa0e51211fbd6eecad25 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Thu, 20 Jun 2013 13:20:59 +0800 Subject: [PATCH] powerpc/eeh: Delay EEH probe during hotplug While doing EEH recovery, the PCI devices of the problematic PE should be removed and then added to the system again. During the so-called hotplug event, the PCI devices of the problematic PE will be probed through early/late phase. We would delay EEH probe on late point for PowerNV platform since the PCI device isn't available in early phase. Signed-off-by: Gavin Shan Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/eeh.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index cda0b62..7d169d3 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -758,6 +758,14 @@ static void eeh_add_device_early(struct device_node *dn) { struct pci_controller *phb; + /* + * If we're doing EEH probe based on PCI device, we + * would delay the probe until late stage because + * the PCI device isn't available this moment. + */ + if (!eeh_probe_mode_devtree()) + return; + if (!of_node_to_eeh_dev(dn)) return; phb = of_node_to_eeh_dev(dn)->phb; @@ -766,7 +774,6 @@ static void eeh_add_device_early(struct device_node *dn) if (NULL == phb || 0 == phb->buid) return; - /* FIXME: hotplug support on POWERNV */ eeh_ops->of_probe(dn, NULL); } @@ -817,6 +824,13 @@ static void eeh_add_device_late(struct pci_dev *dev) edev->pdev = dev; dev->dev.archdata.edev = edev; + /* + * We have to do the EEH probe here because the PCI device + * hasn't been created yet in the early stage. + */ + if (eeh_probe_mode_dev()) + eeh_ops->dev_probe(dev, NULL); + eeh_addr_cache_insert_dev(dev); } -- 2.7.4