diff options
| -rw-r--r-- | drivers/hv/hv.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 748a1c4172a6..332d7c34be5c 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -189,6 +189,17 @@ static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu) int hv_synic_alloc(void) { int cpu; + struct hv_per_cpu_context *hv_cpu; + + /* + * First, zero all per-cpu memory areas so hv_synic_free() can + * detect what memory has been allocated and cleanup properly + * after any failures. + */ + for_each_present_cpu(cpu) { + hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu); + memset(hv_cpu, 0, sizeof(*hv_cpu)); + } hv_context.hv_numa_map = kcalloc(nr_node_ids, sizeof(struct cpumask), GFP_KERNEL); @@ -198,10 +209,8 @@ int hv_synic_alloc(void) } for_each_present_cpu(cpu) { - struct hv_per_cpu_context *hv_cpu - = per_cpu_ptr(hv_context.cpu_context, cpu); + hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu); - memset(hv_cpu, 0, sizeof(*hv_cpu)); tasklet_init(&hv_cpu->msg_dpc, vmbus_on_msg_dpc, (unsigned long) hv_cpu); |