When freezing compound PEs in pnv_ioda_freeze_pe(), we should bail
upon illegal master PE. We needn't freeze slave PE because it should
have been put into frozen state by hardware.
Reported-by: Anton Blanchard <an...@samba.org>
Signed-off-by: Gavin Shan <gws...@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index 762ca14..d035035 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -373,7 +373,9 @@ static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int
pe_no)
/* Fetch master PE */
if (pe->flags & PNV_IODA_PE_SLAVE) {
pe = pe->master;
- WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER));
+ if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)))
+ return;
+
pe_no = pe->pe_number;
}
--
1.8.3.2
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