Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] USB: add modalias sysfs file for usb devices
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+34
drivers/usb/core/sysfs.c
+34
drivers/usb/core/sysfs.c
···
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}
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static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
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+
static ssize_t show_modalias(struct device *dev, char *buf)
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{
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struct usb_interface *intf;
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struct usb_device *udev;
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intf = to_usb_interface(dev);
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udev = interface_to_usbdev(intf);
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if (udev->descriptor.bDeviceClass == 0) {
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struct usb_host_interface *alt = intf->cur_altsetting;
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return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X\n",
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le16_to_cpu(udev->descriptor.idVendor),
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le16_to_cpu(udev->descriptor.idProduct),
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le16_to_cpu(udev->descriptor.bcdDevice),
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udev->descriptor.bDeviceClass,
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udev->descriptor.bDeviceSubClass,
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udev->descriptor.bDeviceProtocol,
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alt->desc.bInterfaceClass,
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alt->desc.bInterfaceSubClass,
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alt->desc.bInterfaceProtocol);
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} else {
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return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic*isc*ip*\n",
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le16_to_cpu(udev->descriptor.idVendor),
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le16_to_cpu(udev->descriptor.idProduct),
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le16_to_cpu(udev->descriptor.bcdDevice),
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udev->descriptor.bDeviceClass,
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udev->descriptor.bDeviceSubClass,
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udev->descriptor.bDeviceProtocol);
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}
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}
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static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
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+
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static struct attribute *intf_attrs[] = {
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&dev_attr_bInterfaceNumber.attr,
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&dev_attr_bAlternateSetting.attr,
···
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&dev_attr_bInterfaceClass.attr,
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&dev_attr_bInterfaceSubClass.attr,
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&dev_attr_bInterfaceProtocol.attr,
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&dev_attr_modalias.attr,
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NULL,
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};
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static struct attribute_group intf_attr_grp = {