iwlwifi: add debug function to reset/reload radio/firmware
Adding function to force reset radio or reload firmware from debugfs.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index d134301..78298be 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -2223,6 +2223,32 @@
return count;
}
+static ssize_t iwl_dbgfs_force_reset_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 reset, ret;
+
+ 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", &reset) != 1)
+ return -EINVAL;
+ switch (reset) {
+ case IWL_RF_RESET:
+ case IWL_FW_RESET:
+ ret = iwl_force_reset(priv, reset);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return ret ? ret : count;
+}
+
DEBUGFS_READ_FILE_OPS(rx_statistics);
DEBUGFS_READ_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -2243,6 +2269,7 @@
DEBUGFS_READ_WRITE_FILE_OPS(missed_beacon);
DEBUGFS_WRITE_FILE_OPS(internal_scan);
DEBUGFS_READ_WRITE_FILE_OPS(plcp_delta);
+DEBUGFS_WRITE_FILE_OPS(force_reset);
/*
* Create the debugfs files and directories
@@ -2296,6 +2323,7 @@
DEBUGFS_ADD_FILE(missed_beacon, dir_debug, S_IWUSR);
DEBUGFS_ADD_FILE(internal_scan, dir_debug, S_IWUSR);
DEBUGFS_ADD_FILE(plcp_delta, dir_debug, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(force_reset, dir_debug, S_IWUSR);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
DEBUGFS_ADD_FILE(ucode_rx_stats, dir_debug, S_IRUSR);
DEBUGFS_ADD_FILE(ucode_tx_stats, dir_debug, S_IRUSR);