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caif_usb: Make the driver name check more efficient

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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>
This commit is contained in:
Ben Hutchings 2012-12-07 06:20:27 +00:00 committed by David S. Miller
parent 406636340c
commit 65d2897c0f
1 changed files with 3 additions and 10 deletions
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13
net/caif/caif_usb.c
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@ -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);