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Commit 6eaed166 authored by Gavin Shan's avatar Gavin Shan Committed by Michael Ellerman
Browse files

powerpc/powernv: Fix the state of root PE 



The PE for root bus (root PE) can be removed because of PCI hot
remove in EEH recovery path for fenced PHB error. We need update
@phb->root_pe_populated accordingly so that the root PE can be
populated again in forthcoming PCI hot add path. Also, the PE
shouldn't be destroyed as it's global and reserved resource.

Fixes: c5f7700b ("powerpc/powernv: Dynamically release PE")
Reported-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent ffed15d3

arch/powerpc/platforms/powernv/pci-ioda.c

+11 −1
Original line number Diff line number Diff line
@@ -3426,6 +3426,16 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe) 
		}

	}



	/*

	 * The PE for root bus can be removed because of hotplug in EEH

	 * recovery for fenced PHB error. We need to mark the PE dead so

	 * that it can be populated again in PCI hot add path. The PE

	 * shouldn't be destroyed as it's the global reserved resource.

	 */

	if (phb->ioda.root_pe_populated &&

	    phb->ioda.root_pe_idx == pe->pe_number)

		phb->ioda.root_pe_populated = false;

	else

		pnv_ioda_free_pe(pe);

}