[PULL 2/6] console: avoid passing con=NULL to graphic_hw_update_done()

[Gerd Hoffmann]

From: lichun <lichun@ruijie.com.cn>

In graphic_hw_update(), first select an existing console,
a specific-console or active_console(if not specified),
then updating the console.

Signed-off-by: lichun <lichun@ruijie.com.cn>
Message-id: 1604682219-114389-1-git-send-email-lichun@ruijie.com.cn
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/console.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ui/console.c b/ui/console.c
index e8e59707d38c..e07d2c380df7 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -270,10 +270,11 @@ void graphic_hw_update_done(QemuConsole *con)
 void graphic_hw_update(QemuConsole *con)
 {
     bool async = false;
+    con = con ? con : active_console;
     if (!con) {
-        con = active_console;
+        return;
     }
-    if (con && con->hw_ops->gfx_update) {
+    if (con->hw_ops->gfx_update) {
         con->hw_ops->gfx_update(con->hw);
         async = con->hw_ops->gfx_update_async;
     }
-- 
2.27.0