From 313483dd72289ff0b7dff4207032d94dbce39cf6 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Wed, 28 Sep 2016 14:34:56 +1000 Subject: [PATCH] powerpc/powernv: Unfreeze PE on allocation This unfreezes PE when it's initialized because the PE might be put into frozen state in the last hot remove path. It's not harmful to do so if the PE is already in unfrozen state. Signed-off-by: Gavin Shan Signed-off-by: Michael Ellerman --- arch/powerpc/platforms/powernv/pci-ioda.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 748d733..fd08a5f 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -126,9 +126,22 @@ static inline bool pnv_pci_is_m64(struct pnv_phb *phb, struct resource *r) static struct pnv_ioda_pe *pnv_ioda_init_pe(struct pnv_phb *phb, int pe_no) { + s64 rc; + phb->ioda.pe_array[pe_no].phb = phb; phb->ioda.pe_array[pe_no].pe_number = pe_no; + /* + * Clear the PE frozen state as it might be put into frozen state + * in the last PCI remove path. It's not harmful to do so when the + * PE is already in unfrozen state. + */ + rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, + OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); + if (rc != OPAL_SUCCESS) + pr_warn("%s: Error %lld unfreezing PHB#%d-PE#%d\n", + __func__, rc, phb->hose->global_number, pe_no); + return &phb->ioda.pe_array[pe_no]; } -- 2.7.4