ath5k: Fix queue debug file

Take txq lock in debug file and fix reporting of used buffers.

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

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath5k/debug.c b/drivers/net/wireless/ath/ath5k/debug.c
index 1b7c6d7fde93..b2c610ba8b7e 100644
--- a/drivers/net/wireless/ath/ath5k/debug.c
+++ b/drivers/net/wireless/ath/ath5k/debug.c
@@ -763,7 +763,7 @@ static ssize_t read_file_queue(struct file *file, char __user *user_buf,
 
         struct ath5k_txq *txq;
         struct ath5k_buf *bf, *bf0;
-        int i, n = 0;
+        int i, n;
 
         len += snprintf(buf+len, sizeof(buf)-len,
                         "available txbuffers: %d\n", sc->txbuf_len);
@@ -777,9 +777,14 @@ static ssize_t read_file_queue(struct file *file, char __user *user_buf,
                 if (!txq->setup)
                         continue;
 
+                n = 0;
+                spin_lock_bh(&txq->lock);
                 list_for_each_entry_safe(bf, bf0, &txq->q, list)
                         n++;
-                len += snprintf(buf+len, sizeof(buf)-len, "  len: %d\n", n);
+                spin_unlock_bh(&txq->lock);
+
+                len += snprintf(buf+len, sizeof(buf)-len,
+                                "  len: %d bufs: %d\n", txq->txq_len, n);
         }
 
         if (len > sizeof(buf))