hw/ptimer: Suppress error messages under qtest

Under qtest ptimer emits lots of warning messages. The messages are caused
by the actual checking of the ptimer error conditions. Suppress those
messages, so they do not distract.
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Message-id: 44877fff4ff03205590698d3dc189ad6d091472f.1473252818.git.digetx@gmail.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/core/ptimer.c

@@ -11,6 +11,7 @@
 #include "hw/ptimer.h"
 #include "qemu/host-utils.h"
 #include "sysemu/replay.h"
+#include "sysemu/qtest.h"
 
 struct ptimer_state
 {
@@ -44,7 +45,9 @@ static void ptimer_reload(ptimer_state *s)
         s->delta = s->limit;
     }
     if (s->delta == 0 || s->period == 0) {
-        fprintf(stderr, "Timer with period zero, disabling\n");
+        if (!qtest_enabled()) {
+            fprintf(stderr, "Timer with period zero, disabling\n");
+        }
         timer_del(s->timer);
         s->enabled = 0;
         return;
@@ -163,7 +166,9 @@ void ptimer_run(ptimer_state *s, int oneshot)
     bool was_disabled = !s->enabled;
 
     if (was_disabled && s->period == 0) {
-        fprintf(stderr, "Timer with period zero, disabling\n");
+        if (!qtest_enabled()) {
+            fprintf(stderr, "Timer with period zero, disabling\n");
+        }
         return;
     }
     s->enabled = oneshot ? 2 : 1;