iwlwifi: keep track of bt coex enable/disable stage

For debugging purpose, keep track of the bt coex enable/disable state.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
index a358d4334a1a..a6dbd8983dac 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
@@ -856,6 +856,9 @@ ssize_t iwl_ucode_bt_stats_read(struct file *file,
         if (!iwl_is_alive(priv))
                 return -EAGAIN;
 
+        if (!priv->bt_enable_flag)
+                return -EINVAL;
+
         /* make request to uCode to retrieve statistics information */
         mutex_lock(&priv->mutex);
         ret = iwl_send_statistics_request(priv, CMD_SYNC, false);