>
> On Thu, Jul 25, 2019 at 12:01 PM Frediano Ziglio <fziglio@xxxxxxxxxx> wrote:
> >
> > >
> > > Add ability to indicate error to external modules via
> > > 'device error' signal when real SpiceUsbDevice is not passed.
> > > This is needed to indicate error during creation of emulated
> > > device, when the device is not created yet. For that we
> > > allocate temporary SpiceUsbDevice structure with backend
> > > device fields set to NULL and use it for indication. Device
> > > description for such device will be 'USB Redirection'.
> > > Unreferencing of such device will be 'no operation'.
> > >
> > > Signed-off-by: Yuri Benditovich <yuri.benditovich@xxxxxxxxxx>
> > > ---
> > > src/usb-backend.c | 3 +++
> > > src/usb-device-manager.c | 14 ++++++++++++--
> > > 2 files changed, 15 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/src/usb-backend.c b/src/usb-backend.c
> > > index 0bf2ecc..c179188 100644
> > > --- a/src/usb-backend.c
> > > +++ b/src/usb-backend.c
> > > @@ -528,6 +528,9 @@ SpiceUsbBackendDevice
> > > *spice_usb_backend_device_ref(SpiceUsbBackendDevice *dev)
> > >
> > > void spice_usb_backend_device_unref(SpiceUsbBackendDevice *dev)
> > > {
> > > + if (!dev) {
> > > + return;
> > > + }
> > > LOUD_DEBUG("%s >> %p(%d)", __FUNCTION__, dev, dev->ref_count);
> > > if (g_atomic_int_dec_and_test(&dev->ref_count)) {
> > > if (dev->libusb_device) {
> > > diff --git a/src/usb-device-manager.c b/src/usb-device-manager.c
> > > index a530be9..0961d16 100644
> > > --- a/src/usb-device-manager.c
> > > +++ b/src/usb-device-manager.c
> > > @@ -935,10 +935,16 @@ static void
> > > spice_usb_device_manager_check_redir_on_connect(
> > > void spice_usb_device_manager_device_error(
> > > SpiceUsbDeviceManager *self, SpiceUsbDevice *device, GError *err)
> > > {
> > > + SpiceUsbDevice *dev = device;
> >
> > "dev" and "device" do not sound great. Maybe "temp_dev" or "fake_dev" ?
> >
> > > g_return_if_fail(SPICE_IS_USB_DEVICE_MANAGER(self));
> > > - g_return_if_fail(device != NULL);
> > > -
> > > + if (device == NULL) {
> > > + dev = g_new0(SpiceUsbDevice, 1);
> > > + dev->ref = 1;
> > > + }
> > > g_signal_emit(self, signals[DEVICE_ERROR], 0, device, err);
> >
> > If device was initially NULL at function call this is still NULL.
>
> Sorry, typo.
>
> >
> > > + if (device == NULL) {
> > > + spice_usb_device_unref(dev);
> >
> > If device was NULL you allocate a new empty SpiceUsbDevice and
> > then free it. Not sure is what you want to do.
> >
> > > + }
I would then rewrite as
{
SpiceUsbDevice *dummy_device = NULL;
g_return_if_fail(SPICE_IS_USB_DEVICE_MANAGER(self));
if (device == NULL) {
dummy_device = g_new0(SpiceUsbDevice, 1);
dummy_device->ref = 1;
device = dummy_device;
}
g_signal_emit(self, signals[DEVICE_ERROR], 0, device, err);
if (dummy_device != NULL) {
spice_usb_device_unref(dummy_device);
}
}
> > > }
> > > #endif
> > >
> > > @@ -1440,6 +1446,10 @@ gchar
> > > *spice_usb_device_get_description(SpiceUsbDevice
> > > *device, const gchar *for
> > >
> > > g_return_val_if_fail(device != NULL, NULL);
> > >
> > > + if (!device->bdev) {
> > > + return g_strdup(_("USB redirection"));
> > > + }
> > > +
> > > bus = spice_usb_device_get_busnum(device);
> > > address = spice_usb_device_get_devaddr(device);
> > > vid = spice_usb_device_get_vid(device);
> >
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