ath9k_htc: Add debugfs support to change debug mask

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Acked-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index cc5d0a4..852cdcf 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -366,6 +366,7 @@ struct ath9k_debug {
        struct dentry *debugfs_recv;
        struct dentry *debugfs_slot;
        struct dentry *debugfs_queue;
+       struct dentry *debugfs_debug;
        struct ath_tx_stats tx_stats;
        struct ath_rx_stats rx_stats;
 };

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
index 8d0de60..7394a1b 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
@@ -435,6 +435,47 @@ static const struct file_operations fops_queue = {
        .llseek = default_llseek,
 };
 
+static ssize_t read_file_debug(struct file *file, char __user *user_buf,
+                              size_t count, loff_t *ppos)
+{
+       struct ath9k_htc_priv *priv = file->private_data;
+       struct ath_common *common = ath9k_hw_common(priv->ah);
+       char buf[32];
+       unsigned int len;
+
+       len = sprintf(buf, "0x%08x\n", common->debug_mask);
+       return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
+                               size_t count, loff_t *ppos)
+{
+       struct ath9k_htc_priv *priv = file->private_data;
+       struct ath_common *common = ath9k_hw_common(priv->ah);
+       unsigned long mask;
+       char buf[32];
+       ssize_t len;
+
+       len = min(count, sizeof(buf) - 1);
+       if (copy_from_user(buf, user_buf, len))
+               return -EFAULT;
+
+       buf[len] = '\0';
+       if (strict_strtoul(buf, 0, &mask))
+               return -EINVAL;
+
+       common->debug_mask = mask;
+       return count;
+}
+
+static const struct file_operations fops_debug = {
+       .read = read_file_debug,
+       .write = write_file_debug,
+       .open = ath9k_debugfs_open,
+       .owner = THIS_MODULE,
+       .llseek = default_llseek,
+};
+
 int ath9k_htc_init_debug(struct ath_hw *ah)
 {
        struct ath_common *common = ath9k_hw_common(ah);
@@ -493,6 +534,13 @@ int ath9k_htc_init_debug(struct ath_hw *ah)
        if (!priv->debug.debugfs_queue)
                goto err;
 
+       priv->debug.debugfs_debug = debugfs_create_file("debug",
+                                                       S_IRUSR | S_IWUSR,
+                                                       priv->debug.debugfs_phy,
+                                                       priv, &fops_debug);
+       if (!priv->debug.debugfs_debug)
+               goto err;
+
        return 0;
 
 err:
@@ -512,6 +560,7 @@ void ath9k_htc_exit_debug(struct ath_hw *ah)
        debugfs_remove(priv->debug.debugfs_tgt_int_stats);
        debugfs_remove(priv->debug.debugfs_tgt_tx_stats);
        debugfs_remove(priv->debug.debugfs_tgt_rx_stats);
+       debugfs_remove(priv->debug.debugfs_debug);
        debugfs_remove(priv->debug.debugfs_phy);
 }