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-rw-r--r--hw/usb/dev-hub.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/hw/usb/dev-hub.c b/hw/usb/dev-hub.c
index 47b7519910..e82a6a6c44 100644
--- a/hw/usb/dev-hub.c
+++ b/hw/usb/dev-hub.c
@@ -402,7 +402,20 @@ static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
port->wPortChange &= ~PORT_STAT_C_ENABLE;
break;
case PORT_SUSPEND:
- port->wPortStatus &= ~PORT_STAT_SUSPEND;
+ if (port->wPortStatus & PORT_STAT_SUSPEND) {
+ port->wPortStatus &= ~PORT_STAT_SUSPEND;
+
+ /*
+ * USB Spec rev2.0 11.24.2.7.2.3 C_PORT_SUSPEND
+ * "This bit is set on the following transitions:
+ * - On transition from the Resuming state to the
+ * SendEOP [sic] state"
+ *
+ * Note that this includes both remote wake-up and
+ * explicit ClearPortFeature(PORT_SUSPEND).
+ */
+ port->wPortChange |= PORT_STAT_C_SUSPEND;
+ }
break;
case PORT_C_SUSPEND:
port->wPortChange &= ~PORT_STAT_C_SUSPEND;