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Commit 360b52b0 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

[PATCH] USB: add modalias sysfs file for usb devices 



Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 25b6f08e

drivers/usb/core/sysfs.c

+34 −0
Original line number Original line Diff line number Diff line
@@ -286,6 +286,39 @@ static ssize_t show_interface_string(struct device *dev, char *buf) 
}

}

static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);

static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);





static ssize_t show_modalias(struct device *dev, char *buf)

{

	struct usb_interface *intf;

	struct usb_device *udev;



	intf = to_usb_interface(dev);

	udev = interface_to_usbdev(intf);

	if (udev->descriptor.bDeviceClass == 0) {

		struct usb_host_interface *alt = intf->cur_altsetting;



		return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X\n",

			       le16_to_cpu(udev->descriptor.idVendor),

			       le16_to_cpu(udev->descriptor.idProduct),

			       le16_to_cpu(udev->descriptor.bcdDevice),

			       udev->descriptor.bDeviceClass,

			       udev->descriptor.bDeviceSubClass,

			       udev->descriptor.bDeviceProtocol,

			       alt->desc.bInterfaceClass,

			       alt->desc.bInterfaceSubClass,

			       alt->desc.bInterfaceProtocol);

 	} else {

		return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic*isc*ip*\n",

			       le16_to_cpu(udev->descriptor.idVendor),

			       le16_to_cpu(udev->descriptor.idProduct),

			       le16_to_cpu(udev->descriptor.bcdDevice),

			       udev->descriptor.bDeviceClass,

			       udev->descriptor.bDeviceSubClass,

			       udev->descriptor.bDeviceProtocol);

	}



}

static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);



static struct attribute *intf_attrs[] = {

static struct attribute *intf_attrs[] = {

	&dev_attr_bInterfaceNumber.attr,

	&dev_attr_bInterfaceNumber.attr,

	&dev_attr_bAlternateSetting.attr,

	&dev_attr_bAlternateSetting.attr,
@@ -293,6 +326,7 @@ static struct attribute *intf_attrs[] = { 
	&dev_attr_bInterfaceClass.attr,

	&dev_attr_bInterfaceClass.attr,

	&dev_attr_bInterfaceSubClass.attr,

	&dev_attr_bInterfaceSubClass.attr,

	&dev_attr_bInterfaceProtocol.attr,

	&dev_attr_bInterfaceProtocol.attr,

	&dev_attr_modalias.attr,

	NULL,

	NULL,

};

};

static struct attribute_group intf_attr_grp = {

static struct attribute_group intf_attr_grp = {