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[Qemu-devel] [PATCH] usb: don't wakeup during coldplug
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH] usb: don't wakeup during coldplug |
Date: |
Tue, 23 May 2017 10:46:35 +0200 |
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1452512
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/usb/core.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/usb/core.c b/hw/usb/core.c
index 45fa00c517..241ae66b15 100644
--- a/hw/usb/core.c
+++ b/hw/usb/core.c
@@ -98,6 +98,14 @@ void usb_wakeup(USBEndpoint *ep, unsigned int stream)
USBDevice *dev = ep->dev;
USBBus *bus = usb_bus_from_device(dev);
+ if (!qdev_hotplug) {
+ /*
+ * This is machine init cold plug. No need to wakeup anyone,
+ * all devices will be reset anyway. And trying to wakeup can
+ * cause problems due to hitting uninitialized devices.
+ */
+ return;
+ }
if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
dev->port->ops->wakeup(dev->port);
}
--
2.9.3
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