uwb: add error messages when reservation establish fails

Add better error messages during the channel change/reservation establish
process.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/uwb/beacon.c b/drivers/uwb/beacon.c
index 57b5ff6..b476187 100644 (file)
--- a/drivers/uwb/beacon.c
+++ b/drivers/uwb/beacon.c
@@ -125,8 +125,10 @@ int uwb_rc_beacon(struct uwb_rc *rc, int channel, unsigned bpst_offset)
        else {
                /* channel >= 0...dah */
                result = uwb_rc_start_beacon(rc, bpst_offset, channel);
-               if (result < 0)
+               if (result < 0) {
+                       dev_err(dev, "Cannot start beaconing: %d\n", result);
                        return result;
+               }
                if (le16_to_cpu(rc->ies->wIELength) > 0) {
                        result = uwb_rc_set_ie(rc, rc->ies);
                        if (result < 0) {

diff --git a/drivers/uwb/rsv.c b/drivers/uwb/rsv.c
index 4026f1a..0887ae9 100644 (file)
--- a/drivers/uwb/rsv.c
+++ b/drivers/uwb/rsv.c
@@ -163,8 +163,10 @@ static int uwb_rsv_get_stream(struct uwb_rsv *rsv)
        }
 
        stream = find_first_zero_bit(streams_bm, UWB_NUM_STREAMS);
-       if (stream >= UWB_NUM_STREAMS)
+       if (stream >= UWB_NUM_STREAMS) {
+               dev_err(dev, "%s: no available stream found\n", __func__);
                return -EBUSY;
+       }
 
        rsv->stream = stream;
        set_bit(stream, streams_bm);
@@ -555,12 +557,16 @@ int uwb_rsv_establish(struct uwb_rsv *rsv)
 {
        struct uwb_rc *rc = rsv->rc;
        struct uwb_mas_bm available;
+       struct device *dev = &rc->uwb_dev.dev;
        int ret;
 
        mutex_lock(&rc->rsvs_mutex);
        ret = uwb_rsv_get_stream(rsv);
-       if (ret)
+       if (ret) {
+               dev_err(dev, "%s: uwb_rsv_get_stream failed: %d\n",
+                       __func__, ret);
                goto out;
+       }
 
        rsv->tiebreaker = prandom_u32() & 1;
        /* get available mas bitmap */
@@ -570,12 +576,16 @@ int uwb_rsv_establish(struct uwb_rsv *rsv)
        if (ret == UWB_RSV_ALLOC_NOT_FOUND) {
                ret = -EBUSY;
                uwb_rsv_put_stream(rsv);
+               dev_err(dev, "%s: uwb_rsv_find_best_allocation failed: %d\n",
+                       __func__, ret);
                goto out;
        }
 
        ret = uwb_drp_avail_reserve_pending(rc, &rsv->mas);
        if (ret != 0) {
                uwb_rsv_put_stream(rsv);
+               dev_err(dev, "%s: uwb_drp_avail_reserve_pending failed: %d\n",
+                       __func__, ret);
                goto out;
        }