hv: allocate synic pages for all present CPUs

It may happen that not all CPUs are online when we do hv_synic_alloc() and
in case more CPUs come online later we may try accessing these allocated
structures.

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index b44b32f21e61..dc11296d50fd 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -411,7 +411,7 @@ int hv_synic_alloc(void)
                 goto err;
         }
 
-        for_each_online_cpu(cpu) {
+        for_each_present_cpu(cpu) {
                 hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC);
                 if (hv_context.event_dpc[cpu] == NULL) {
                         pr_err("Unable to allocate event dpc\n");
@@ -482,7 +482,7 @@ void hv_synic_free(void)
         int cpu;
 
         kfree(hv_context.hv_numa_map);
-        for_each_online_cpu(cpu)
+        for_each_present_cpu(cpu)
                 hv_synic_free_cpu(cpu);
 }