iwlwifi: remove log_event debugfs file debugging is disabled

When debugging is disabled, the event log functions aren't
functional in the way that the debugfs file expects. This
leads to the debugfs access crashing. Since the event log
functions aren't functional then, remove the debugfs file
when CONFIG_IWLWIFI_DEBUG is not set.

Cc: stable@kernel.org
Reported-by: Lekensteyn <lekensteyn@gmail.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index e7c157e5ebebdb2c181d1473a02de769e570e3e0..7f97dec8534db1f60ba843bfa317b5cf303a6285 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -2239,6 +2239,7 @@ static ssize_t iwl_dbgfs_echo_test_write(struct file *file,
        return count;
 }
 
+#ifdef CONFIG_IWLWIFI_DEBUG
 static ssize_t iwl_dbgfs_log_event_read(struct file *file,
                                         char __user *user_buf,
                                         size_t count, loff_t *ppos)
@@ -2276,6 +2277,7 @@ static ssize_t iwl_dbgfs_log_event_write(struct file *file,
 
        return count;
 }
+#endif
 
 static ssize_t iwl_dbgfs_calib_disabled_read(struct file *file,
                                         char __user *user_buf,
@@ -2345,7 +2347,9 @@ DEBUGFS_READ_FILE_OPS(bt_traffic);
 DEBUGFS_READ_WRITE_FILE_OPS(protection_mode);
 DEBUGFS_READ_FILE_OPS(reply_tx_error);
 DEBUGFS_WRITE_FILE_OPS(echo_test);
+#ifdef CONFIG_IWLWIFI_DEBUG
 DEBUGFS_READ_WRITE_FILE_OPS(log_event);
+#endif
 DEBUGFS_READ_WRITE_FILE_OPS(calib_disabled);
 
 /*
@@ -2405,7 +2409,9 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
        DEBUGFS_ADD_FILE(rxon_flags, dir_debug, S_IWUSR);
        DEBUGFS_ADD_FILE(rxon_filter_flags, dir_debug, S_IWUSR);
        DEBUGFS_ADD_FILE(echo_test, dir_debug, S_IWUSR);
+#ifdef CONFIG_IWLWIFI_DEBUG
        DEBUGFS_ADD_FILE(log_event, dir_debug, S_IWUSR | S_IRUSR);
+#endif
 
        if (iwl_advanced_bt_coexist(priv))
                DEBUGFS_ADD_FILE(bt_traffic, dir_debug, S_IRUSR);