diff options
| author |   Matthew Garrett <mjg@redhat.com> | 2012-02-03 17:11:54 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-09 08:40:11 -0800 |
| commit | 0846e7e9856c0928223447d9349a877202a63f24 (patch) | |
| tree | 1ef6df58927568478e17396855c579ad45aa9fee /drivers/usb/core/sysfs.c | |
| parent | usb-storage: reorganize target-specific code (diff) | |
| download | linux-dev-0846e7e9856c0928223447d9349a877202a63f24.tar.xz linux-dev-0846e7e9856c0928223447d9349a877202a63f24.zip | |
usb: Add support for indicating whether a port is removable
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>
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 9e491ca2e5c4..566d9f94f735 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -230,6 +230,28 @@ show_urbnum(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL); +static ssize_t +show_removable(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct usb_device *udev; + char *state; + + udev = to_usb_device(dev); + + switch (udev->removable) { + case USB_DEVICE_REMOVABLE: + state = "removable"; + break; + case USB_DEVICE_FIXED: + state = "fixed"; + break; + default: + state = "unknown"; + } + + return sprintf(buf, "%s\n", state); +} +static DEVICE_ATTR(removable, S_IRUGO, show_removable, NULL); #ifdef CONFIG_PM @@ -626,6 +648,7 @@ static struct attribute *dev_attrs[] = { &dev_attr_avoid_reset_quirk.attr, &dev_attr_authorized.attr, &dev_attr_remove.attr, + &dev_attr_removable.attr, NULL, }; static struct attribute_group dev_attr_grp = { |