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USB: add devpath sysfs attribute 

This is not exported from the usb core, yet we rely on it to create
paths to interfaces for this device in sysfs.  Export it to make
userspace tools have an easier time to figure things out.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-11-30 11:15:02 -08:00
parent be30fc4b65
commit 9af23624ae
1 changed files with 12 additions and 1 deletions
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13
drivers/usb/core/sysfs.c
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@ -138,6 +138,16 @@ show_devnum(struct device *dev, struct device_attribute *attr, char *buf)
}
static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);
static ssize_t
show_devpath(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_device *udev;
udev = to_usb_device(dev);
return sprintf(buf, "%s\n", udev->devpath);
}
static DEVICE_ATTR(devpath, S_IRUGO, show_devpath, NULL);
static ssize_t
show_version(struct device *dev, struct device_attribute *attr, char *buf)
{
@ -538,8 +548,8 @@ static struct attribute *dev_attrs[] = {
&dev_attr_bConfigurationValue.attr,
&dev_attr_bmAttributes.attr,
&dev_attr_bMaxPower.attr,
&dev_attr_urbnum.attr,
/* device attributes */
&dev_attr_urbnum.attr,
&dev_attr_idVendor.attr,
&dev_attr_idProduct.attr,
&dev_attr_bcdDevice.attr,
@ -551,6 +561,7 @@ static struct attribute *dev_attrs[] = {
&dev_attr_speed.attr,
&dev_attr_busnum.attr,
&dev_attr_devnum.attr,
&dev_attr_devpath.attr,
&dev_attr_version.attr,
&dev_attr_maxchild.attr,
&dev_attr_quirks.attr,