diff options
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 0a1f2b52a12..a34e0f098f6 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -512,7 +512,16 @@ static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, int usbhid_open(struct hid_device *hid) { - ++hid->open; + struct usbhid_device *usbhid = hid->driver_data; + int res; + + if (!hid->open++) { + res = usb_autopm_get_interface(usbhid->intf); + if (res < 0) { + hid->open--; + return -EIO; + } + } if (hid_start_in(hid)) hid_io_error(hid); return 0; @@ -522,8 +531,10 @@ void usbhid_close(struct hid_device *hid) { struct usbhid_device *usbhid = hid->driver_data; - if (!--hid->open) + if (!--hid->open) { usb_kill_urb(usbhid->urbin); + usb_autopm_put_interface(usbhid->intf); + } } /* @@ -1048,6 +1059,7 @@ static struct usb_driver hid_driver = { .pre_reset = hid_pre_reset, .post_reset = hid_post_reset, .id_table = hid_usb_ids, + .supports_autosuspend = 1, }; static int __init hid_init(void) |