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powerpc/powernv: Unfreeze PE on allocation

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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 <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Gavin Shan 2016-09-28 14:34:56 +10:00 committed by Michael Ellerman
parent e0056b0a12
commit 313483dd72
1 changed files with 13 additions and 0 deletions
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13
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -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];
}