diff options
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 62679bc031fb..0b387c1a8b7e 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1824,6 +1824,20 @@ static int proc_release_port(struct dev_state *ps, void __user *arg) return usb_hub_release_port(ps->dev, portnum, ps); } +static int proc_get_capabilities(struct dev_state *ps, void __user *arg) +{ + __u32 caps; + + caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM; + if (!ps->dev->bus->no_stop_on_short) + caps |= USBDEVFS_CAP_BULK_CONTINUATION; + + if (put_user(caps, (__u32 __user *)arg)) + return -EFAULT; + + return 0; +} + /* * NOTE: All requests here that have interface numbers as parameters * are assuming that somehow the configuration has been prevented from @@ -1994,6 +2008,9 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd, snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); ret = proc_release_port(ps, p); break; + case USBDEVFS_GET_CAPABILITIES: + ret = proc_get_capabilities(ps, p); + break; } usb_unlock_device(dev); if (ret >= 0) |