[PATCH] Drivers: hv: Do not free synic pages when they were not allocated

[Nuno Das Neves]

In case of root partition or snp, the synic pages are allocated by the
hypervisor instead of the kernel, so they should not be freed.

Signed-off-by: Nuno Das Neves <nunodasneves@xxxxxxxxxxxxxxxxxxx>
---
 drivers/hv/hv.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index c7f7652932ca..a10cf642c9ad 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -193,8 +193,10 @@ void hv_synic_free(void)
 		struct hv_per_cpu_context *hv_cpu
 			= per_cpu_ptr(hv_context.cpu_context, cpu);
 
-		free_page((unsigned long)hv_cpu->synic_event_page);
-		free_page((unsigned long)hv_cpu->synic_message_page);
+		if (!hv_isolation_type_snp() && !hv_root_partition) {
+			free_page((unsigned long)hv_cpu->synic_event_page);
+			free_page((unsigned long)hv_cpu->synic_message_page);
+		}
 		free_page((unsigned long)hv_cpu->post_msg_page);
 	}
 
-- 
2.25.1