diff options
Diffstat (limited to 'drivers/hid/usbhid/hid-core.c')
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 18e5ddd722cd..d746bf8284dd 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -781,6 +781,8 @@ static int usbhid_start(struct hid_device *hid) unsigned int n, insize = 0; int ret; + clear_bit(HID_DISCONNECTED, &usbhid->iofl); + usbhid->bufsize = HID_MIN_BUFFER_SIZE; hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); @@ -847,12 +849,6 @@ static int usbhid_start(struct hid_device *hid) } } - if (!usbhid->urbin) { - err_hid("couldn't find an input interrupt endpoint"); - ret = -ENODEV; - goto fail; - } - init_waitqueue_head(&usbhid->wait); INIT_WORK(&usbhid->reset_work, hid_reset); setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); @@ -888,6 +884,9 @@ fail: usb_free_urb(usbhid->urbin); usb_free_urb(usbhid->urbout); usb_free_urb(usbhid->urbctrl); + usbhid->urbin = NULL; + usbhid->urbout = NULL; + usbhid->urbctrl = NULL; hid_free_buffers(dev, hid); mutex_unlock(&usbhid->setup); return ret; @@ -924,6 +923,9 @@ static void usbhid_stop(struct hid_device *hid) usb_free_urb(usbhid->urbin); usb_free_urb(usbhid->urbctrl); usb_free_urb(usbhid->urbout); + usbhid->urbin = NULL; /* don't mess up next start */ + usbhid->urbctrl = NULL; + usbhid->urbout = NULL; hid_free_buffers(hid_to_usb_dev(hid), hid); mutex_unlock(&usbhid->setup); @@ -940,15 +942,26 @@ static struct hid_ll_driver usb_hid_driver = { static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id) { + struct usb_host_interface *interface = intf->cur_altsetting; struct usb_device *dev = interface_to_usbdev(intf); struct usbhid_device *usbhid; struct hid_device *hid; + unsigned int n, has_in = 0; size_t len; int ret; dbg_hid("HID probe called for ifnum %d\n", intf->altsetting->desc.bInterfaceNumber); + for (n = 0; n < interface->desc.bNumEndpoints; n++) + if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) + has_in++; + if (!has_in) { + dev_err(&intf->dev, "couldn't find an input interrupt " + "endpoint\n"); + return -ENODEV; + } + hid = hid_allocate_device(); if (IS_ERR(hid)) return PTR_ERR(hid); |