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| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2014-11-12 13:36:10 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-11-14 17:24:25 +1100 |
| commit | ec8e4e9d3d83b7a973477c2cb4831511b0eec06e (patch) | |
| tree | a8409156326d0bd40e320b4c8b8a91144134cf41 /arch/powerpc/platforms/powernv/pci-ioda.c | |
| parent | 4773f76b61e5cbf41ad514978d9338d8a7ed49e1 (diff) | |
| download | blackbird-op-linux-ec8e4e9d3d83b7a973477c2cb4831511b0eec06e.tar.gz blackbird-op-linux-ec8e4e9d3d83b7a973477c2cb4831511b0eec06e.zip | |
powerpc/powernv: Bail upon invalid master PE
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 <anton@samba.org>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci-ioda.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 762ca14228ea..d03503515692 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; } |
