diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2012-12-07 06:20:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-09 00:34:02 -0500 |
| commit | 65d2897c0f1b240420d657f41e561239fa10ba94 (patch) | |
| tree | ebb17b49e84fe9394316dab9ae561572704d5902 /net | |
| parent | 406636340c301b46062b22f94e3815ef767bd6a3 (diff) | |
| download | lwn-65d2897c0f1b240420d657f41e561239fa10ba94.tar.gz lwn-65d2897c0f1b240420d657f41e561239fa10ba94.zip | |
caif_usb: Make the driver name check more efficient
Use the device model to get just the name, rather than using the
ethtool API to get all driver information.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/caif/caif_usb.c | 13 |
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); |