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-rw-r--r--net/caif/caif_usb.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/net/caif/caif_usb.c b/net/caif/caif_usb.c
index 582f80c8ef3d..3ebc8cbc91ff 100644
--- a/net/caif/caif_usb.c
+++ b/net/caif/caif_usb.c
@@ -128,17 +128,10 @@ static int cfusbl_device_notify(struct notifier_block *me, unsigned long what,
struct cflayer *layer, *link_support;
struct usbnet *usbnet;
struct usb_device *usbdev;
- struct ethtool_drvinfo drvinfo;
- /*
- * Quirks: High-jack ethtool to find if we have a NCM device,
- * and find it's VID/PID.
- */
- if (dev->ethtool_ops == NULL || dev->ethtool_ops->get_drvinfo == NULL)
- return 0;
-
- dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
- if (strncmp(drvinfo.driver, "cdc_ncm", 7) != 0)
+ /* Check whether we have a NCM device, and find its VID/PID. */
+ if (!(dev->dev.parent && dev->dev.parent->driver &&
+ strcmp(dev->dev.parent->driver->name, "cdc_ncm") == 0))
return 0;
usbnet = netdev_priv(dev);

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