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Diffstat (limited to 'drivers/hv/hv.c')
| -rw-r--r-- | drivers/hv/hv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index fcc52797c169..d6320022af15 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -250,6 +250,13 @@ int hv_synic_cleanup(unsigned int cpu) unsigned long flags; /* + * Hyper-V does not provide a way to change the connect CPU once + * it is set; we must prevent the connect CPU from going offline. + */ + if (cpu == VMBUS_CONNECT_CPU) + return -EBUSY; + + /* * Search for channels which are bound to the CPU we're about to * cleanup. In case we find one and vmbus is still connected we need to * fail, this will effectively prevent CPU offlining. There is no way |