rt2x00: Add rt2x00dev->flags to debugfs

Loosely based on the patch by Matthijs Kooijman,
this will add the dev_flags entry into debugfs which
will display rt2x00dev->flags.
This will allow easier debugging of flag handling.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00debug.c b/drivers/net/wireless/rt2x00/rt2x00debug.c
index 4d2aaecd9dfe..9275d6f9517e 100644
--- a/drivers/net/wireless/rt2x00/rt2x00debug.c
+++ b/drivers/net/wireless/rt2x00/rt2x00debug.c
@@ -57,6 +57,7 @@ struct rt2x00debug_intf {
          * - driver folder
          * - driver file
          * - chipset file
+         * - device flags file
          * - register offset/value files
          * - eeprom offset/value files
          * - bbp offset/value files
@@ -65,6 +66,7 @@ struct rt2x00debug_intf {
         struct dentry *driver_folder;
         struct dentry *driver_entry;
         struct dentry *chipset_entry;
+        struct dentry *dev_flags;
         struct dentry *csr_off_entry;
         struct dentry *csr_val_entry;
         struct dentry *eeprom_off_entry;
@@ -193,6 +195,34 @@ RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 
+static ssize_t rt2x00debug_read_dev_flags(struct file *file,
+                                          char __user *buf,
+                                          size_t length,
+                                          loff_t *offset)
+{
+        struct rt2x00debug_intf *intf = file->private_data;
+        char line[16];
+        size_t size;
+
+        if (*offset)
+                return 0;
+
+        size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
+
+        if (copy_to_user(buf, line, size))
+                return -EFAULT;
+
+        *offset += size;
+        return size;
+}
+
+static const struct file_operations rt2x00debug_fop_dev_flags = {
+        .owner          = THIS_MODULE,
+        .read           = rt2x00debug_read_dev_flags,
+        .open           = rt2x00debug_file_open,
+        .release        = rt2x00debug_file_release,
+};
+
 static struct dentry *rt2x00debug_create_file_driver(const char *name,
                                                      struct rt2x00debug_intf
                                                      *intf,
@@ -270,6 +300,12 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
         if (IS_ERR(intf->chipset_entry))
                 goto exit;
 
+        intf->dev_flags = debugfs_create_file("dev_flags", S_IRUGO,
+                                              intf->driver_folder, intf,
+                                              &rt2x00debug_fop_dev_flags);
+        if (IS_ERR(intf->dev_flags))
+                goto exit;
+
 #define RT2X00DEBUGFS_CREATE_ENTRY(__intf, __name)              \
 ({                                                              \
         (__intf)->__name##_off_entry =                          \
@@ -320,6 +356,7 @@ void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
         debugfs_remove(intf->eeprom_off_entry);
         debugfs_remove(intf->csr_val_entry);
         debugfs_remove(intf->csr_off_entry);
+        debugfs_remove(intf->dev_flags);
         debugfs_remove(intf->chipset_entry);
         debugfs_remove(intf->driver_entry);
         debugfs_remove(intf->driver_folder);