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usb: Add support for indicating whether a port is removable

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Userspace may want to make policy decisions based on whether or not a
given USB device is removable. Add a per-device member and support
for exposing it in sysfs. Information sources to populate it will be
added later.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthew Garrett 2012-02-03 17:11:54 -05:00 • committed by Greg Kroah-Hartman
parent af74d2dae8
commit 0846e7e985
3 changed files with 42 additions and 0 deletions
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8
include/linux/usb.h
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@ -376,6 +376,12 @@ struct usb_bus {
struct usb_tt;
enum usb_device_removable {
USB_DEVICE_REMOVABLE_UNKNOWN = 0,
USB_DEVICE_REMOVABLE,
USB_DEVICE_FIXED,
};
/**
* struct usb_device - kernel's representation of a USB device
* @devnum: device number; address on a USB bus
@ -432,6 +438,7 @@ struct usb_tt;
* @wusb_dev: if this is a Wireless USB device, link to the WUSB
* specific data for the device.
* @slot_id: Slot ID assigned by xHCI
* @removable: Device can be physically removed from this port
*
* Notes:
* Usbcore drivers should not set usbdev->state directly. Instead use
@ -509,6 +516,7 @@ struct usb_device {
#endif
struct wusb_dev *wusb_dev;
int slot_id;
enum usb_device_removable removable;
};
#define to_usb_device(d) container_of(d, struct usb_device, dev)