Drivers: hv: vmbus: Call hv_synic_free() if hv_synic_alloc() fails

Commit 5720863 ("Drivers: hv: vmbus: Cleanup synic memory free path")
says "Any memory allocations that succeeded will be freed when the caller
cleans up by calling hv_synic_free()", but if the get_zeroed_page() in
hv_synic_alloc() fails, currently hv_synic_free() is not really called
in vmbus_bus_init(), consequently there will be a memory leak, e.g.
hv_context.hv_numa_map is not freed in the error path. Fix this by
updating the goto labels.

Cc: stable@kernel.org
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Fixes: 4df4cb9 ("x86/hyperv: Initialize clockevents earlier in CPU onlining")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20230504224155.10484-1-decui@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

drivers/hv/vmbus_drv.c

@@ -1372,7 +1372,7 @@ static int vmbus_bus_init(void)
  ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "hyperv/vmbus:online",
  hv_synic_init, hv_synic_cleanup);
  if (ret < 0)
- goto err_cpuhp;
+ goto err_alloc;
  hyperv_cpuhp_online = ret;
 
  ret = vmbus_connect();
@@ -1392,9 +1392,8 @@ static int vmbus_bus_init(void)
 
 err_connect:
  cpuhp_remove_state(hyperv_cpuhp_online);
-err_cpuhp:
- hv_synic_free();
 err_alloc:
+ hv_synic_free();
  if (vmbus_irq == -1) {
  hv_remove_vmbus_handler();
  } else {