1 files changed, 46 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index af00ad2afa1..02f80bc2130 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -2131,6 +2131,49 @@ static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
 	return ret;
 }
 
+static ssize_t iwl_dbgfs_missed_beacon_read(struct file *file,
+					char __user *user_buf,
+					size_t count, loff_t *ppos) {
+
+	struct iwl_priv *priv = file->private_data;
+	int pos = 0;
+	char buf[12];
+	const size_t bufsz = sizeof(buf);
+	ssize_t ret;
+
+	pos += scnprintf(buf + pos, bufsz - pos, "%d\n",
+			priv->missed_beacon_threshold);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+	return ret;
+}
+
+static ssize_t iwl_dbgfs_missed_beacon_write(struct file *file,
+					 const char __user *user_buf,
+					 size_t count, loff_t *ppos)
+{
+	struct iwl_priv *priv = file->private_data;
+	char buf[8];
+	int buf_size;
+	int missed;
+
+	memset(buf, 0, sizeof(buf));
+	buf_size = min(count, sizeof(buf) -  1);
+	if (copy_from_user(buf, user_buf, buf_size))
+		return -EFAULT;
+	if (sscanf(buf, "%d", &missed) != 1)
+		return -EINVAL;
+
+	if (missed < IWL_MISSED_BEACON_THRESHOLD_MIN ||
+	    missed > IWL_MISSED_BEACON_THRESHOLD_MAX)
+		priv->missed_beacon_threshold =
+			IWL_MISSED_BEACON_THRESHOLD_DEF;
+	else
+		priv->missed_beacon_threshold = missed;
+
+	return count;
+}
+
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -2148,6 +2191,7 @@ DEBUGFS_WRITE_FILE_OPS(clear_traffic_statistics);
 DEBUGFS_WRITE_FILE_OPS(csr);
 DEBUGFS_READ_WRITE_FILE_OPS(ucode_tracing);
 DEBUGFS_READ_FILE_OPS(fh_reg);
+DEBUGFS_READ_WRITE_FILE_OPS(missed_beacon);
 
 /*
  * Create the debugfs files and directories
@@ -2200,6 +2244,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 	DEBUGFS_ADD_FILE(clear_traffic_statistics, debug, S_IWUSR);
 	DEBUGFS_ADD_FILE(csr, debug, S_IWUSR);
 	DEBUGFS_ADD_FILE(fh_reg, debug, S_IRUSR);
+	DEBUGFS_ADD_FILE(missed_beacon, debug, S_IWUSR);
 	if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
 		DEBUGFS_ADD_FILE(ucode_rx_stats, debug, S_IRUSR);
 		DEBUGFS_ADD_FILE(ucode_tx_stats, debug, S_IRUSR);
@@ -2260,6 +2305,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
 			file_clear_traffic_statistics);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_csr);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_fh_reg);
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_missed_beacon);
 	if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
 		DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
 			file_ucode_rx_stats);