hv: init percpu_list in hv_synic_alloc()

Initializing hv_context.percpu_list in hv_synic_alloc() helps to prevent a
crash in percpu_channel_enq() when not all CPUs were online during
initialization and it naturally belongs there.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index dc11296..1393756 100644 (file)
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -457,6 +457,8 @@ int hv_synic_alloc(void)
                        pr_err("Unable to allocate post msg page\n");
                        goto err;
                }
+
+               INIT_LIST_HEAD(&hv_context.percpu_list[cpu]);
        }
 
        return 0;
@@ -552,8 +554,6 @@ void hv_synic_init(void *arg)
        rdmsrl(HV_X64_MSR_VP_INDEX, vp_index);
        hv_context.vp_index[cpu] = (u32)vp_index;
 
-       INIT_LIST_HEAD(&hv_context.percpu_list[cpu]);
-
        /*
         * Register the per-cpu clockevent source.
         */