ath5k: Count how many times a queue got stuck

Add a counter to show how many times a queue got stuck in the debugfs queue
file.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index afedfeba13dd..cae9fe4676e7 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -892,6 +892,7 @@ ath5k_txq_setup(struct ath5k_softc *sc,
                 txq->setup = true;
                 txq->txq_len = 0;
                 txq->txq_poll_mark = false;
+                txq->txq_stuck = 0;
         }
         return &sc->txqs[qnum];
 }
@@ -2193,6 +2194,7 @@ ath5k_tx_complete_poll_work(struct work_struct *work)
                                                   "TX queue stuck %d\n",
                                                   txq->qnum);
                                         needreset = true;
+                                        txq->txq_stuck++;
                                         spin_unlock_bh(&txq->lock);
                                         break;
                                 } else {
diff --git a/drivers/net/wireless/ath/ath5k/base.h b/drivers/net/wireless/ath/ath5k/base.h
index d8e2674aec71..7f9d0d3018e8 100644
--- a/drivers/net/wireless/ath/ath5k/base.h
+++ b/drivers/net/wireless/ath/ath5k/base.h
@@ -88,6 +88,7 @@ struct ath5k_txq {
         bool                    setup;
         int                     txq_len; /* number of queued buffers */
         bool                    txq_poll_mark;
+        unsigned int            txq_stuck;      /* informational counter */
 };
 
 #define ATH5K_LED_MAX_NAME_LEN 31
diff --git a/drivers/net/wireless/ath/ath5k/debug.c b/drivers/net/wireless/ath/ath5k/debug.c
index b2c610ba8b7e..6583a82a0783 100644
--- a/drivers/net/wireless/ath/ath5k/debug.c
+++ b/drivers/net/wireless/ath/ath5k/debug.c
@@ -785,6 +785,8 @@ static ssize_t read_file_queue(struct file *file, char __user *user_buf,
 
                 len += snprintf(buf+len, sizeof(buf)-len,
                                 "  len: %d bufs: %d\n", txq->txq_len, n);
+                len += snprintf(buf+len, sizeof(buf)-len,
+                                "  stuck: %d\n", txq->txq_stuck);
         }
 
         if (len > sizeof(buf))