diff options
Diffstat (limited to 'drivers/hv/hv.c')
| -rw-r--r-- | drivers/hv/hv.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 533c8b82b344..857290dcfd95 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -117,8 +117,6 @@ int hv_synic_alloc(void) pr_err("Unable to allocate post msg page\n"); goto err; } - - INIT_LIST_HEAD(&hv_cpu->chan_list); } return 0; @@ -246,10 +244,18 @@ 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 - * we can re-bind channels to different CPUs for now. + * cleanup. In case we find one and vmbus is still connected, we + * fail; this will effectively prevent CPU offlining. + * + * TODO: Re-bind the channels to different CPUs. */ mutex_lock(&vmbus_connection.channel_mutex); list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |