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hv: allocate synic pages for all present CPUs

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commit 421b8f20d3 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vitaly Kuznetsov
2016-12-07 01:16:25 -08:00
committed by Greg Kroah-Hartman
parent 80190fcc48
commit 374907e8d1
1 changed files with 2 additions and 2 deletions
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4
drivers/hv/hv.c
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@@ -422,7 +422,7 @@ 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");
@@ -485,7 +485,7 @@ 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);
}