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>

2 files changed, 15 insertions, 3 deletions

diff --git a/drivers/uwb/beacon.c b/drivers/uwb/beacon.c
index 57b5ff61020c..b476187adf55 100644
--- 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 4026f1adff01..0887ae982783 100644
--- 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;
         }