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usb-hub: report status changes only once

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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-03-20 12:40:11 +01:00
parent c24e4aac3b
commit a309ee6e0a
1 changed files with 5 additions and 1 deletions
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6
hw/usb/dev-hub.c
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@ -33,6 +33,7 @@ typedef struct USBHubPort {
USBPort port; USBPort port;
uint16_t wPortStatus; uint16_t wPortStatus;
uint16_t wPortChange; uint16_t wPortChange;
uint16_t wPortChange_reported;
} USBHubPort; } USBHubPort;
typedef struct USBHubState { typedef struct USBHubState {
@ -467,8 +468,11 @@ static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
status = 0; status = 0;
for(i = 0; i < NUM_PORTS; i++) { for(i = 0; i < NUM_PORTS; i++) {
port = &s->ports[i]; port = &s->ports[i];
if (port->wPortChange) if (port->wPortChange &&
port->wPortChange_reported != port->wPortChange) {
status |= (1 << (i + 1)); status |= (1 << (i + 1));
}
port->wPortChange_reported = port->wPortChange;
} }
if (status != 0) { if (status != 0) {
for(i = 0; i < n; i++) { for(i = 0; i < n; i++) {