[PATCH next] Drivers: hv: mshv: Prevent potential NULL dereference

[Dan Carpenter]

Move the NULL check on "partition" before the dereference.

Fixes: f5288d14069b ("Drivers: hv: Introduce mshv_root module to expose 
/dev/mshv to VMMs")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/hv/mshv_synic.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/hv/mshv_synic.c b/drivers/hv/mshv_synic.c
index a3daedd680ff..88949beb5e37 100644
--- a/drivers/hv/mshv_synic.c
+++ b/drivers/hv/mshv_synic.c
@@ -151,13 +151,12 @@ static bool mshv_async_call_completion_isr(struct 
hv_message *msg)
        rcu_read_lock();
 
        partition = mshv_partition_find(partition_id);
-       partition->async_hypercall_status = async_msg->status;
-
        if (unlikely(!partition)) {
                pr_debug("failed to find partition %llu\n", partition_id);
                goto unlock_out;
        }
 
+       partition->async_hypercall_status = async_msg->status;
        complete(&partition->async_hypercall);
 
        handled = true;
-- 
2.47.2