powerpc/eeh: Allow to freeze PE in eeh_pe_set_option()

Function eeh_pe_set_option() is used to apply the requested options
(enable, disable, unfreeze) in EEH virtualization path. The semantics
of this function isn't complete until freezing is supported.

This allows to freeze the indicated PE. The new semantics is going to
be used in PCI surprise hot remove path, to freeze removed PCI devices
(PE) to avoid unexpected EEH error reporting.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 7429556eb8df7e468b447a1b6d4c541253c06295..0699f15f44cfe264f92664087dbbdef1582d5eda 100644 (file)
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1502,6 +1502,7 @@ int eeh_pe_set_option(struct eeh_pe *pe, int option)
                break;
        case EEH_OPT_THAW_MMIO:
        case EEH_OPT_THAW_DMA:
+       case EEH_OPT_FREEZE_PE:
                if (!eeh_ops || !eeh_ops->set_option) {
                        ret = -ENOENT;
                        break;