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input: add trace events for full queues

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It isn't unusual to happen, for example during reboot when the guest
doesn't reveice events for a while.  So better don't flood stderr
with alarming messages.  Turn them into tracepoints instead so they
can be enabled in case they are needed for trouble-shooting.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1466675495-28797-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2016-06-23 11:51:35 +02:00
parent d7b7f526b1
commit c80276b420
3 changed files with 10 additions and 2 deletions
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3
hw/input/hid.c
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@ -27,6 +27,7 @@
#include "ui/console.h"
#include "qemu/timer.h"
#include "hw/input/hid.h"
#include "trace.h"
#define HID_USAGE_ERROR_ROLLOVER 0x01
#define HID_USAGE_POSTFAIL 0x02
@ -234,7 +235,7 @@ static void hid_keyboard_event(DeviceState *dev, QemuConsole *src,
key->down,
scancodes);
if (hs->n + count > QUEUE_LENGTH) {
fprintf(stderr, "usb-kbd: warning: key event queue full\n");
trace_hid_kbd_queue_full();
return;
}
for (i = 0; i < count; i++) {