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authorVitaly Kuznetsov <vkuznets@redhat.com>2016-12-07 01:16:25 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-12 06:37:29 +0100
commit374907e8d11613e790328b109041dca9578e3b1f (patch)
treee818e366c19db42092bb6652affac81bcb154191
parent80190fcc48f68b321e3fe65a1526da1ce2e3e6ba (diff)
downloadlinux-linaro-stable-374907e8d11613e790328b109041dca9578e3b1f.tar.gz
hv: allocate synic pages for all present CPUs
commit 421b8f20d3c381b215f988b42428f56fc3b82405 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>
-rw-r--r--drivers/hv/hv.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 63194a9a7189..ad62a725fb5b 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -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);
}