On Wed, Nov 10, 2010 at 06:37:45PM +0000, Blue Swirl wrote:
> On Wed, Nov 10, 2010 at 5:14 PM, Gleb Natapov <gleb@xxxxxxxxxx> wrote:
> >
> > Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
> > ---
> > hw/usb-bus.c | 35 +++++++++++++++++++++++++++++++++++
> > 1 files changed, 35 insertions(+), 0 deletions(-)
> >
> > diff --git a/hw/usb-bus.c b/hw/usb-bus.c
> > index 256b881..6292282 100644
> > --- a/hw/usb-bus.c
> > +++ b/hw/usb-bus.c
> > @@ -5,11 +5,13 @@
> > #include "monitor.h"
> >
> > static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
> > +static char *usbbus_get_fw_dev_path(DeviceState *dev);
> >
> > static struct BusInfo usb_bus_info = {
> > .name = "USB",
> > .size = sizeof(USBBus),
> > .print_dev = usb_bus_dev_print,
> > + .get_fw_dev_path = usbbus_get_fw_dev_path,
> > };
> > static int next_usb_bus = 0;
> > static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
> > @@ -307,3 +309,36 @@ USBDevice *usbdevice_create(const char *cmdline)
> > }
> > return usb->usbdevice_init(params);
> > }
> > +
> > +static int usbbus_get_fw_dev_path_helper(USBDevice *d, USBBus *bus, char *p,
> > + int len)
> > +{
> > + int l = 0;
> > + USBPort *port;
> > +
> > + QTAILQ_FOREACH(port, &bus->used, next) {
> > + if (port->dev != d)
>
> Braces.
>
> > + continue;
> > +
> > + if (port->pdev) {
> > + l = usbbus_get_fw_dev_path_helper(port->pdev, bus, p, len);
> > + }
> > + l += snprintf(p + l, len - l, "%s@%x/", qdev_fw_name(&d->qdev),
> > + port->index);
> > + return l;
> > + }
> > + return 0;
>
> With this return value...
>
> > +}
This can only happen if device is not attached to parent bus, so we
should never get here I think. I do not know USB bus enough to be sure.
May be we should abort here.
> > +
> > +static char *usbbus_get_fw_dev_path(DeviceState *dev)
> > +{
> > + USBDevice *d = (USBDevice*)dev;
> > + USBBus *bus = usb_bus_from_device(d);
> > + char path[100];
> > + int l;
> > +
> > + l = usbbus_get_fw_dev_path_helper(d, bus, path, sizeof(path));
> > + path[l-1] = '\0';
>
> ...this statement will have undesirable effects...
>
> > +
> > + return strdup(path);
>
> ...like this.
--
Gleb.
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