iwlwifi: trigger event log from debugfs

This patch adds a trigger for event log printing to debugfs.
It removes the triger from sysfs.

Signed-off-by: Ester Kummer <ester.kummer@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index f7ec2009cdf9..c64e602bc9b6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -92,6 +92,14 @@ static const struct file_operations iwl_dbgfs_##name##_ops = {          \
         .open = iwl_dbgfs_open_file_generic,                            \
 };
 
+#define DEBUGFS_WRITE_FILE_OPS(name)                                    \
+        DEBUGFS_WRITE_FUNC(name);                                       \
+static const struct file_operations iwl_dbgfs_##name##_ops = {          \
+        .write = iwl_dbgfs_##name##_write,                              \
+        .open = iwl_dbgfs_open_file_generic,                            \
+};
+
+
 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
         DEBUGFS_READ_FUNC(name);                                        \
         DEBUGFS_WRITE_FUNC(name);                                       \
@@ -324,7 +332,29 @@ static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
         return ret;
 }
 
+static ssize_t iwl_dbgfs_log_event_write(struct file *file,
+                                        const char __user *user_buf,
+                                        size_t count, loff_t *ppos)
+{
+        struct iwl_priv *priv = file->private_data;
+        u32 event_log_flag;
+        char buf[8];
+        int buf_size;
+
+        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", &event_log_flag) != 1)
+                return -EFAULT;
+        if (event_log_flag == 1)
+                iwl_dump_nic_event_log(priv);
+
+        return count;
+}
+
 DEBUGFS_READ_WRITE_FILE_OPS(sram);
+DEBUGFS_WRITE_FILE_OPS(log_event);
 DEBUGFS_READ_FILE_OPS(eeprom);
 DEBUGFS_READ_FILE_OPS(stations);
 DEBUGFS_READ_FILE_OPS(rx_statistics);
@@ -354,6 +384,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
         DEBUGFS_ADD_FILE(eeprom, data);
         DEBUGFS_ADD_FILE(sram, data);
+        DEBUGFS_ADD_FILE(log_event, data);
         DEBUGFS_ADD_FILE(stations, data);
         DEBUGFS_ADD_FILE(rx_statistics, data);
         DEBUGFS_ADD_FILE(tx_statistics, data);
@@ -384,6 +415,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB