Exemple #1
0
static gboolean
input_accel_open (GUdevDevice        *device,
		  ReadingsUpdateFunc  callback_func,
		  gpointer            user_data)
{
	const gchar * const subsystems[] = { "input", NULL };
	const char *mount_matrix;

	drv_data = g_new0 (DrvData, 1);
	drv_data->dev = g_object_ref (device);
	drv_data->parent = g_udev_device_get_parent (drv_data->dev);
	drv_data->dev_path = g_udev_device_get_device_file (device);
	drv_data->name = g_udev_device_get_property (device, "NAME");
	drv_data->client = g_udev_client_new (subsystems);

	mount_matrix = g_udev_device_get_property (device, "ACCEL_MOUNT_MATRIX");
	if (!parse_mount_matrix (mount_matrix, &drv_data->mount_matrix)) {
		g_warning ("Invalid mount-matrix ('%s'), falling back to identity",
			   mount_matrix);
		parse_mount_matrix (NULL, &drv_data->mount_matrix);
	}

	drv_data->callback_func = callback_func;
	drv_data->user_data = user_data;

	g_signal_connect (drv_data->client, "uevent",
			  G_CALLBACK (uevent_received), NULL);

	g_idle_add (first_values, NULL);

	return TRUE;
}
/**
 * cd_plugin_is_device_embedded:
 **/
static gboolean
cd_plugin_is_device_embedded (GUdevDevice *device)
{
	GUdevDevice *p = device;
	const gchar *removable;
	gboolean embedded = FALSE;
	guint i;
	g_autoptr(GPtrArray) array = NULL;

	/* get a chain of all the parent devices */
	array = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
	do {
		p = g_udev_device_get_parent (p);
		if (p == NULL)
			break;
		g_ptr_array_add (array, p);
	} while (TRUE);

	/* find a parent with a removable sysfs file */
	for (i = 0; i < array->len; i++) {
		p = g_ptr_array_index (array, i);
		removable = g_udev_device_get_sysfs_attr (p, "removable");
		if (removable != NULL) {
			if (g_strcmp0 (removable, "fixed") == 0)
				embedded = TRUE;
			break;
		}
	}
	return embedded;
}
Exemple #3
0
static char *
get_bus (GUdevDevice *device)
{
	const char *subsystem;
	char *bus_str;
	GUdevDevice *parent;

	bus_str = get_uinput_subsystem (device);
	if (bus_str)
		return bus_str;

	subsystem = g_udev_device_get_subsystem (device);
	parent = g_object_ref (device);

	while (parent && ((g_strcmp0 (subsystem, "input") == 0) ||
			  (g_strcmp0 (subsystem, "hid") == 0)) ){
		GUdevDevice *old_parent = parent;
		parent = g_udev_device_get_parent (old_parent);
		if (parent)
			subsystem = g_udev_device_get_subsystem (parent);
		g_object_unref (old_parent);
	}

	if (parent) {
		if (g_strcmp0 (subsystem, "tty") == 0 || g_strcmp0 (subsystem, "serio") == 0)
			bus_str = g_strdup ("serial");
		else
			bus_str = g_strdup (subsystem);

		g_object_unref (parent);
	} else
		bus_str = strdup("unknown");

	return bus_str;
}
static char *
get_driver_name (GUdevDevice *device)
{
    GUdevDevice *parent = NULL;
    const char *driver, *subsys;
    char *ret = NULL;

    driver = g_udev_device_get_driver (device);
    if (!driver) {
        parent = g_udev_device_get_parent (device);
        if (parent)
            driver = g_udev_device_get_driver (parent);

        /* Check for bluetooth; it's driver is a bunch of levels up so we
         * just check for the subsystem of the parent being bluetooth.
         */
        if (!driver && parent) {
            subsys = g_udev_device_get_subsystem (parent);
            if (subsys && !strcmp (subsys, "bluetooth"))
                driver = "bluetooth";
        }
    }

    if (driver)
        ret = g_strdup (driver);
    if (parent)
        g_object_unref (parent);

    return ret;
}
Exemple #5
0
static gboolean
fu_altos_device_find_tty (FuAltosDevice *self, GError **error)
{
	GUsbDevice *usb_device = fu_usb_device_get_dev (FU_USB_DEVICE (self));
	g_autoptr(GList) devices = NULL;
	g_autoptr(GUdevClient) gudev_client = g_udev_client_new (NULL);

	/* find all tty devices */
	devices = g_udev_client_query_by_subsystem (gudev_client, "tty");
	for (GList *l = devices; l != NULL; l = l->next) {
		GUdevDevice *dev = G_UDEV_DEVICE (l->data);

		/* get the tty device */
		const gchar *dev_file = g_udev_device_get_device_file (dev);
		if (dev_file == NULL)
			continue;

		/* get grandparent */
		dev = g_udev_device_get_parent (dev);
		if (dev == NULL)
			continue;
		dev = g_udev_device_get_parent (dev);
		if (dev == NULL)
			continue;

		/* check correct device */
		if (g_udev_device_get_sysfs_attr_as_int (dev, "busnum") !=
		    g_usb_device_get_bus (usb_device))
			continue;
		if (g_udev_device_get_sysfs_attr_as_int (dev, "devnum") !=
		    g_usb_device_get_address (usb_device))
			continue;

		/* success */
		self->tty = g_strdup (dev_file);
		return TRUE;
	}

	/* failure */
	g_set_error (error,
		     FWUPD_ERROR,
		     FWUPD_ERROR_NOT_SUPPORTED,
		     "failed to find tty for %u:%u",
		     g_usb_device_get_bus (usb_device),
		     g_usb_device_get_address (usb_device));
	return FALSE;
}
static Killswitch *
killswitch_new (GUdevDevice *device, RfKillType rtype)
{
	Killswitch *ks;
	GUdevDevice *parent = NULL, *grandparent = NULL;
	const char *driver, *subsys, *parent_subsys = NULL;

	ks = g_malloc0 (sizeof (Killswitch));
	ks->name = g_strdup (g_udev_device_get_name (device));
	ks->seqnum = g_udev_device_get_seqnum (device);
	ks->path = g_strdup (g_udev_device_get_sysfs_path (device));
	ks->rtype = rtype;

	driver = g_udev_device_get_property (device, "DRIVER");
	subsys = g_udev_device_get_subsystem (device);

	/* Check parent for various attributes */
	parent = g_udev_device_get_parent (device);
	if (parent) {
		parent_subsys = g_udev_device_get_subsystem (parent);
		if (!driver)
			driver = g_udev_device_get_property (parent, "DRIVER");
		if (!driver) {
			/* Sigh; try the grandparent */
			grandparent = g_udev_device_get_parent (parent);
			if (grandparent)
				driver = g_udev_device_get_property (grandparent, "DRIVER");
		}
	}

	if (!driver)
		driver = "(unknown)";
	ks->driver = g_strdup (driver);

	if (   g_strcmp0 (subsys, "platform") == 0
	    || g_strcmp0 (parent_subsys, "platform") == 0
	    || g_strcmp0 (subsys, "acpi") == 0
	    || g_strcmp0 (parent_subsys, "acpi") == 0)
		ks->platform = TRUE;

	if (grandparent)
		g_object_unref (grandparent);
	if (parent)
		g_object_unref (parent);
	return ks;
}
Exemple #7
0
static gboolean device_is_serial(GUdevDevice * device)
{
	GUdevDevice *parent;
	parent = g_udev_device_get_parent(device);
	if (parent) {
		/* Serial driver */
		if (g_strcmp0(g_udev_device_get_name(parent), "serial8250") == 0) {
			g_object_unref(parent);
			return TRUE;
		}
		g_object_unref(parent);
	}
	return FALSE;
}
Exemple #8
0
static gboolean device_is_usb_serial(GUdevDevice * device)
{
	GUdevDevice *parent;
	parent = g_udev_device_get_parent(device);
	if (parent) {
		/* Serial driver */
		if (g_strcmp0(g_udev_device_get_subsystem(parent), "usb-serial") == 0) {
			g_object_unref(parent);
			return TRUE;
		}
		g_object_unref(parent);
	}
	return FALSE;
}
const char *
nmp_utils_udev_get_driver (GUdevDevice *device)
{
	GUdevDevice *parent = NULL, *grandparent = NULL;
	const char *driver, *subsys;

	driver = g_udev_device_get_driver (device);
	if (driver)
		goto out;

	/* Try the parent */
	parent = g_udev_device_get_parent (device);
	if (parent) {
		driver = g_udev_device_get_driver (parent);
		if (!driver) {
			/* Try the grandparent if it's an ibmebus device or if the
			 * subsys is NULL which usually indicates some sort of
			 * platform device like a 'gadget' net interface.
			 */
			subsys = g_udev_device_get_subsystem (parent);
			if (   (g_strcmp0 (subsys, "ibmebus") == 0)
			    || (subsys == NULL)) {
				grandparent = g_udev_device_get_parent (parent);
				if (grandparent)
					driver = g_udev_device_get_driver (grandparent);
			}
		}
	}
	g_clear_object (&parent);
	g_clear_object (&grandparent);

out:
	/* Intern the string so we don't have to worry about memory
	 * management in NMPlatformLink. */
	return g_intern_string (driver);
}
Exemple #10
0
static void dump_device_and_parent(GUdevDevice * device, guint indent)
{
	const gchar *const *list;
	const gchar *const *iter;
	GUdevDevice *parent;
	char propstr[500];
	guint32 namelen = 0, i;

	println(indent, "------------------------------------------------------");
	println(indent, "%-20s %s", _("Name:"), g_udev_device_get_name(device));
	println(indent, "%-20s %s", _("Type:"), g_udev_device_get_devtype(device));
	println(indent, "%-20s %s", _("Subsystem:"), g_udev_device_get_subsystem(device));
	println(indent, "%-20s %s", _("Number:"), g_udev_device_get_number(device));
	println(indent, "%-20s %s", _("Path:"), g_udev_device_get_sysfs_path(device));
	println(indent, "%-20s %s", _("Driver:"), g_udev_device_get_driver(device));
	println(indent, "%-20s %lld", _("Sequential Number:"), (long long int)g_udev_device_get_seqnum(device));
	println(indent, "%-20s %s", _("Device File:"), g_udev_device_get_device_file(device));

	println(indent, " ");
	println(indent, _("Properties:"));

	/* Get longest property name length for alignment */
	list = g_udev_device_get_property_keys(device);
	for (iter = list; iter && *iter; iter++) {
		if (strlen(*iter) > namelen)
			namelen = strlen(*iter);
	}
	namelen++;

	for (iter = list; iter && *iter; iter++) {
		strcpy(propstr, *iter);
		strcat(propstr, ":");
		for (i = 0; i < namelen - strlen(*iter); i++)
			strcat(propstr, " ");
		strcat(propstr, g_udev_device_get_property(device, *iter));
		println(indent + 2, "%s", propstr);
	}

	println(indent, " ");

	parent = g_udev_device_get_parent(device);
	if (parent) {
		dump_device_and_parent(parent, indent + 4);
		g_object_unref(parent);
	}
}
Exemple #11
0
static gboolean
dev_get_attrs (GUdevDevice *udev_device,
               const char **out_ifname,
               const char **out_path,
               char **out_driver)
{
    GUdevDevice *parent = NULL;
    const char *ifname, *driver, *path;

    g_return_val_if_fail (udev_device != NULL, FALSE);
    g_return_val_if_fail (out_ifname != NULL, FALSE);
    g_return_val_if_fail (out_path != NULL, FALSE);
    g_return_val_if_fail (out_driver != NULL, FALSE);

    ifname = g_udev_device_get_name (udev_device);
    if (!ifname) {
        nm_log_dbg (LOGD_HW, "failed to get device's interface");
        return FALSE;
    }

    path = g_udev_device_get_sysfs_path (udev_device);
    if (!path) {
        nm_log_warn (LOGD_HW, "couldn't determine device path; ignoring...");
        return FALSE;
    }

    driver = g_udev_device_get_driver (udev_device);
    if (!driver) {
        /* Try the parent */
        parent = g_udev_device_get_parent (udev_device);
        if (parent) {
            driver = g_udev_device_get_driver (parent);
            g_object_unref (parent);
        }
    }

    *out_ifname = ifname;
    *out_path = path;
    *out_driver = g_strdup (driver);

    return TRUE;
}
Exemple #12
0
/* Overriding SUBSYSTEM isn't allowed in udev (works sometimes, but not
 * always). For evemu devices we need to set custom properties to make them
 * detected by libwacom.
 */
static char *
get_uinput_subsystem (GUdevDevice *device)
{
	const char *bus_str;
	GUdevDevice *parent;


	bus_str = NULL;
	parent = g_object_ref (device);

	while (parent && !g_udev_device_get_property_as_boolean (parent, "UINPUT_DEVICE")) {
		GUdevDevice *old_parent = parent;
		parent = g_udev_device_get_parent (old_parent);
		g_object_unref (old_parent);
	}

	if (parent) {
		bus_str = g_udev_device_get_property (parent, "UINPUT_SUBSYSTEM");
		g_object_unref (parent);
	}

	return bus_str ? g_strdup (bus_str) : NULL;
}
Exemple #13
0
static GUdevDevice *
find_physical_device (GUdevDevice *child)
{
    GUdevDevice *iter, *old = NULL;
    GUdevDevice *physdev = NULL;
    const char *subsys, *type, *name;
    guint32 i = 0;
    gboolean is_usb = FALSE, is_pci = FALSE, is_pcmcia = FALSE, is_platform = FALSE;
    gboolean is_pnp = FALSE;

    g_return_val_if_fail (child != NULL, NULL);

    /* Bluetooth rfcomm devices are "virtual" and don't necessarily have
     * parents at all.
     */
    name = g_udev_device_get_name (child);
    if (name && strncmp (name, "rfcomm", 6) == 0)
        return g_object_ref (child);

    iter = g_object_ref (child);
    while (iter && i++ < 8) {
        subsys = g_udev_device_get_subsystem (iter);
        if (subsys) {
            if (is_usb || g_str_has_prefix (subsys, "usb")) {
                is_usb = TRUE;
                type = g_udev_device_get_devtype (iter);
                if (type && !strcmp (type, "usb_device")) {
                    physdev = iter;
                    break;
                }
            } else if (is_pcmcia || !strcmp (subsys, "pcmcia")) {
                GUdevDevice *pcmcia_parent;
                const char *tmp_subsys;

                is_pcmcia = TRUE;

                /* If the parent of this PCMCIA device is no longer part of
                 * the PCMCIA subsystem, we want to stop since we're looking
                 * for the base PCMCIA device, not the PCMCIA controller which
                 * is usually PCI or some other bus type.
                 */
                pcmcia_parent = g_udev_device_get_parent (iter);
                if (pcmcia_parent) {
                    tmp_subsys = g_udev_device_get_subsystem (pcmcia_parent);
                    if (tmp_subsys && strcmp (tmp_subsys, "pcmcia"))
                        physdev = iter;
                    g_object_unref (pcmcia_parent);
                    if (physdev)
                        break;
                }
            } else if (is_platform || !strcmp (subsys, "platform")) {
                /* Take the first platform parent as the physical device */
                is_platform = TRUE;
                physdev = iter;
                break;
            } else if (is_pci || !strcmp (subsys, "pci")) {
                is_pci = TRUE;
                physdev = iter;
                break;
            } else if (is_pnp || !strcmp (subsys, "pnp")) {
                is_pnp = TRUE;
                physdev = iter;
                break;
            }
        }

        old = iter;
        iter = g_udev_device_get_parent (old);
        g_object_unref (old);
    }

    return physdev;
}
Exemple #14
0
static gboolean
get_device_info (const char            *path,
		 int                   *vendor_id,
		 int                   *product_id,
		 char                 **name,
		 WacomBusType          *bus,
		 WacomIntegrationFlags *integration_flags,
		 WacomError            *error)
{
	GUdevClient *client;
	GUdevDevice *device;
	const char * const subsystems[] = { "input", NULL };
	gboolean retval;
	char *bus_str;
	const char *devname;

#if NEED_G_TYPE_INIT
	g_type_init();
#endif

	retval = FALSE;
	/* The integration flags from device info are unset by default */
	*integration_flags = WACOM_DEVICE_INTEGRATED_UNSET;
	*name = NULL;
	bus_str = NULL;
	client = g_udev_client_new (subsystems);
	device = g_udev_client_query_by_device_file (client, path);
	if (device == NULL) {
		libwacom_error_set(error, WERROR_INVALID_PATH, "Could not find device '%s' in udev", path);
		goto out;
	}

	/* Touchpads are only for the "Finger" part of Bamboo devices */
	if (!is_tablet_or_touchpad(device)) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent(device);
		if (!parent || !is_tablet_or_touchpad(parent)) {
			libwacom_error_set(error, WERROR_INVALID_PATH, "Device '%s' is not a tablet", path);
			g_object_unref (parent);
			goto out;
		}
		g_object_unref (parent);
	}

	/* Is the device integrated in display? */
	devname = g_udev_device_get_name (device);
	if (devname != NULL) {
		char *sysfs_path, *contents;

		sysfs_path = g_build_filename ("/sys/class/input", devname, "device/properties", NULL);
		if (g_file_get_contents (sysfs_path, &contents, NULL, NULL)) {
			int flag;

			flag = atoi(contents);
			flag &= (1 << INPUT_PROP_DIRECT) | (1 << INPUT_PROP_POINTER);
			/*
			 * To ensure we are dealing with a screen tablet, need
			 * to check that it has DIRECT and non-POINTER (DIRECT
			 * alone is not sufficient since it's set for drawing
			 * tablets as well)
			 */
			if (flag == (1 << INPUT_PROP_DIRECT))
				*integration_flags = WACOM_DEVICE_INTEGRATED_DISPLAY;
			else
				*integration_flags = WACOM_DEVICE_INTEGRATED_NONE;

			g_free (contents);
		}
		g_free (sysfs_path);
	}

	*name = g_strdup (g_udev_device_get_sysfs_attr (device, "name"));
	/* Try getting the name from the parent if that fails */
	if (*name == NULL) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent (device);
		if (!parent)
			goto out;
		*name = g_strdup (g_udev_device_get_sysfs_attr (parent, "name"));
		g_object_unref (parent);
	}

	/* Parse the PRODUCT attribute (for Bluetooth, USB, I2C) */
	retval = get_bus_vid_pid (device, bus, vendor_id, product_id, error);
	if (retval)
		goto out;

	bus_str = get_bus (device);
	*bus = bus_from_str (bus_str);

	if (*bus == WBUSTYPE_SERIAL) {
		/* The serial bus uses 0:0 as the vid/pid */
		*vendor_id = 0;
		*product_id = 0;
		retval = TRUE;
	} else {
		libwacom_error_set(error, WERROR_UNKNOWN_MODEL, "Unsupported bus '%s'", bus_str);
	}

out:
	if (bus_str != NULL)
		g_free (bus_str);
	if (retval == FALSE)
		g_free (*name);
	if (device != NULL)
		g_object_unref (device);
	if (client != NULL)
		g_object_unref (client);
	return retval;
}
Exemple #15
0
static gboolean
get_bus_vid_pid (GUdevDevice  *device,
		 WacomBusType *bus,
		 int          *vendor_id,
		 int          *product_id,
		 WacomError   *error)
{
	GUdevDevice *parent;
	const char *product_str;
	gchar **splitted_product = NULL;
	unsigned int bus_id;
	gboolean retval = FALSE;

	/* Parse that:
	 * E: PRODUCT=5/56a/81/100
	 * into:
	 * vendor 0x56a
	 * product 0x81 */
	parent = g_object_ref (device);
	product_str = g_udev_device_get_property (device, "PRODUCT");

	while (!product_str && parent) {
		GUdevDevice *old_parent = parent;
		parent = g_udev_device_get_parent (old_parent);
		if (parent)
			product_str = g_udev_device_get_property (parent, "PRODUCT");
		g_object_unref (old_parent);
	}

	if (!product_str)
		/* PRODUCT not found, hoping the old method will work */
		goto out;

	splitted_product = g_strsplit (product_str, "/", 4);
	if (g_strv_length (splitted_product) != 4) {
		libwacom_error_set(error, WERROR_UNKNOWN_MODEL, "Unable to parse model identification");
		goto out;
	}

	bus_id = (int)strtoul (splitted_product[0], NULL, 16);
	*vendor_id = (int)strtol (splitted_product[1], NULL, 16);
	*product_id = (int)strtol (splitted_product[2], NULL, 16);

	switch (bus_id) {
	case 3:
		*bus = WBUSTYPE_USB;
		retval = TRUE;
		break;
	case 5:
		*bus = WBUSTYPE_BLUETOOTH;
		retval = TRUE;
		break;
	case 24:
		*bus = WBUSTYPE_I2C;
		retval = TRUE;
		break;
	}

out:
	if (splitted_product)
		g_strfreev (splitted_product);
	g_object_unref (parent);
	return retval;
}
static void
nm_device_update_description (NMDevice *device)
{
	NMDevicePrivate *priv;
	const char *subsys[3] = { "net", "tty", NULL };
	GUdevDevice *udev_device = NULL, *tmpdev;
	const char *ifname;
	guint32 count = 0;
	const char *vendor, *model;

	g_return_if_fail (NM_IS_DEVICE (device));
	priv = NM_DEVICE_GET_PRIVATE (device);

	if (!priv->client) {
		priv->client = g_udev_client_new (subsys);
		if (!priv->client)
			return;
	}

	ifname = nm_device_get_iface (device);
	if (!ifname)
		return;

	if (NM_IS_DEVICE_ETHERNET (device) || NM_IS_DEVICE_WIFI (device))
		udev_device = g_udev_client_query_by_subsystem_and_name (priv->client, "net", ifname);
	else if (NM_IS_GSM_DEVICE (device) || NM_IS_CDMA_DEVICE (device))
		udev_device = g_udev_client_query_by_subsystem_and_name (priv->client, "tty", ifname);
	if (!udev_device)
		return;

	g_free (priv->product);
	priv->product = NULL;
	g_free (priv->vendor);
	priv->vendor = NULL;

	/* Walk up the chain of the device and its parents a few steps to grab
	 * vendor and device ID information off it.
	 */
	tmpdev = udev_device;
	while ((count++ < 3) && tmpdev && (!priv->vendor || !priv->product)) {
		if (!priv->vendor)
			priv->vendor = get_decoded_property (tmpdev, "ID_VENDOR_ENC");

		if (!priv->product)
			priv->product = get_decoded_property (tmpdev, "ID_MODEL_ENC");

		tmpdev = g_udev_device_get_parent (tmpdev);
	}

	/* If we didn't get strings directly from the device, try database strings */
	tmpdev = udev_device;
	count = 0;
	while ((count++ < 3) && tmpdev && (!priv->vendor || !priv->product)) {
		if (!priv->vendor) {
			vendor = g_udev_device_get_property (tmpdev, "ID_VENDOR_FROM_DATABASE");
			if (vendor)
				priv->vendor = g_strdup (vendor);
		}

		if (!priv->product) {
			model = g_udev_device_get_property (tmpdev, "ID_MODEL_FROM_DATABASE");
			if (model)
				priv->product = g_strdup (model);
		}

		tmpdev = g_udev_device_get_parent (tmpdev);
	}

	_nm_object_queue_notify (NM_OBJECT (device), NM_DEVICE_VENDOR);
	_nm_object_queue_notify (NM_OBJECT (device), NM_DEVICE_PRODUCT);
}
Exemple #17
0
MMQmiPort *
mm_base_modem_peek_port_qmi_for_data (MMBaseModem *self,
                                      MMPort *data,
                                      GError **error)
{
    MMQmiPort *found;
    GUdevClient *client;
    GUdevDevice *data_device;
    GUdevDevice *data_device_parent;
    GList *l;

    if (mm_port_get_subsys (data) != MM_PORT_SUBSYS_NET) {
        g_set_error (error,
                     MM_CORE_ERROR,
                     MM_CORE_ERROR_UNSUPPORTED,
                     "Cannot look for QMI port associated to a non-net data port");
        return NULL;
    }

    /* don't listen for uevents */
    client = g_udev_client_new (NULL);

    /* Get udev device for the data port */
    data_device = (g_udev_client_query_by_subsystem_and_name (
                       client,
                       "net",
                       mm_port_get_device (data)));
    if (!data_device) {
        g_set_error (error,
                     MM_CORE_ERROR,
                     MM_CORE_ERROR_FAILED,
                     "Couldn't find udev device for port 'net/%s'",
                     mm_port_get_device (data));
        g_object_unref (client);
        return NULL;
    }

    /* Get parent of the data device */
    data_device_parent = g_udev_device_get_parent (data_device);
    if (!data_device_parent) {
        g_set_error (error,
                     MM_CORE_ERROR,
                     MM_CORE_ERROR_FAILED,
                     "Couldn't get udev device parent for port 'net/%s'",
                     mm_port_get_device (data));
        g_object_unref (data_device);
        g_object_unref (client);
        return NULL;
    }

    /* Now walk the list of QMI ports looking for a match */
    found = NULL;
    for (l = self->priv->qmi; l && !found; l = g_list_next (l)) {
        GUdevDevice *qmi_device;
        GUdevDevice *qmi_device_parent;

        /* Get udev device for the QMI port */
        qmi_device = (g_udev_client_query_by_subsystem_and_name (
                          client,
                          "usb",
                          mm_port_get_device (MM_PORT (l->data))));
        if (!qmi_device) {
            qmi_device = (g_udev_client_query_by_subsystem_and_name (
                              client,
                              "usbmisc",
                              mm_port_get_device (MM_PORT (l->data))));
            if (!qmi_device) {
                mm_warn ("Couldn't get udev device for QMI port '%s'",
                         mm_port_get_device (MM_PORT (l->data)));
                continue;
            }
        }

        /* Get parent of the QMI device */
        qmi_device_parent = g_udev_device_get_parent (qmi_device);
        g_object_unref (qmi_device);

        if (!data_device_parent) {
            mm_warn ("Couldn't get udev device parent for QMI port '%s'",
                     mm_port_get_device (MM_PORT (l->data)));
            continue;
        }

        if (g_str_equal (g_udev_device_get_sysfs_path (data_device_parent),
                         g_udev_device_get_sysfs_path (qmi_device_parent)))
            found = MM_QMI_PORT (l->data);

        g_object_unref (qmi_device_parent);
    }

    g_object_unref (data_device_parent);
    g_object_unref (data_device);
    g_object_unref (client);

    if (!found) {
        /* For the case where we have only 1 data port and 1 QMI port and they
         * don't match with the previous rules (e.g. in some Huawei modems),
         * just return the found one */
        if (g_list_length (self->priv->data) == 1 &&
            g_list_length (self->priv->qmi) == 1 &&
            self->priv->data->data == data) {
            mm_info ("Assuming QMI port '%s' is associated to net/%s",
                     mm_port_get_device (MM_PORT (self->priv->qmi->data)),
                     mm_port_get_device (data));
            found = MM_QMI_PORT (self->priv->qmi->data);
        } else {
            g_set_error (error,
                         MM_CORE_ERROR,
                         MM_CORE_ERROR_NOT_FOUND,
                         "Couldn't find associated QMI port for 'net/%s'",
                         mm_port_get_device (data));
            return NULL;
        }
    }

    return found;
}