drivers/staging/uwb/ie-rcv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Ultra Wide Band
   4  * IE Received notification handling.
   5  *
   6  * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
   7  */
   8
   9 #include <linux/errno.h>
  10 #include <linux/module.h>
  11 #include <linux/device.h>
  12 #include <linux/bitmap.h>
  13 #include "uwb-internal.h"
  14
  15 /*
  16  * Process an incoming IE Received notification.
  17  */
  18 int uwbd_evt_handle_rc_ie_rcv(struct uwb_event *evt)
  19 {
  20         int result = -EINVAL;
  21         struct device *dev = &evt->rc->uwb_dev.dev;
  22         struct uwb_rc_evt_ie_rcv *iercv;
  23
  24         /* Is there enough data to decode it? */
  25         if (evt->notif.size < sizeof(*iercv)) {
  26                 dev_err(dev, "IE Received notification: Not enough data to "
  27                         "decode (%zu vs %zu bytes needed)\n",
  28                         evt->notif.size, sizeof(*iercv));
  29                 goto error;
  30         }
  31         iercv = container_of(evt->notif.rceb, struct uwb_rc_evt_ie_rcv, rceb);
  32
  33         dev_dbg(dev, "IE received, element ID=%d\n", iercv->IEData[0]);
  34
  35         if (iercv->IEData[0] == UWB_RELINQUISH_REQUEST_IE) {
  36                 dev_warn(dev, "unhandled Relinquish Request IE\n");
  37         }
  38
  39         return 0;
  40 error:
  41         return result;
  42 }