[PATCH] Drivers: hv: mshv: Fix uninitialized variable in hv_call_map_stat_page()

[Dan Carpenter]

If the hv_do_hypercall() succeeds on the first iteration then "ret" is
not initialized.  I re-arranged this code to make the loop clearer and
to make it more clear that we return zero on the last line.

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_root_hv_call.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hv/mshv_root_hv_call.c b/drivers/hv/mshv_root_hv_call.c
index b72b59a5068b..a74e13a32183 100644
--- a/drivers/hv/mshv_root_hv_call.c
+++ b/drivers/hv/mshv_root_hv_call.c
@@ -733,7 +733,7 @@ int hv_call_map_stat_page(enum hv_stats_object_type type,
        u64 status, pfn;
        int ret;
 
-       do {
+       while (1) {
                local_irq_save(flags);
                input = *this_cpu_ptr(hyperv_pcpu_input_arg);
                output = *this_cpu_ptr(hyperv_pcpu_output_arg);
@@ -756,11 +756,11 @@ int hv_call_map_stat_page(enum hv_stats_object_type type,
                                            hv_current_partition_id, 1);
                if (ret)
                        return ret;
-       } while (!ret);
+       }
 
        *addr = page_address(pfn_to_page(pfn));
 
-       return ret;
+       return 0;
 }
 
 int hv_call_unmap_stat_page(enum hv_stats_object_type type,
-- 
2.47.2