ath9k: Fix BTCOEX debugfs file usage

The debugfs file for dumping btcoex parameters unconditionally
assumes a MCI-based device. This will not work for older btcoex
chips. Fix this by branching out the routine into separate
functions.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index a8be94b2a53a..585aee47860c 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1599,8 +1599,14 @@ static ssize_t read_file_btcoex(struct file *file, char __user *user_buf,
         if (buf == NULL)
                 return -ENOMEM;
 
-        len = ath9k_dump_btcoex(sc, buf, len, size);
+        if (!sc->sc_ah->common.btcoex_enabled) {
+                len = snprintf(buf, size, "%s\n",
+                               "BTCOEX is disabled");
+                goto exit;
+        }
 
+        len = ath9k_dump_btcoex(sc, buf, size);
+exit:
         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
         kfree(buf);