s390/sclp_sd: fix warnings about missing parameter description

Fix these warnings that are reported when compiling with W=1:

  drivers/s390/char/sclp_sd.c:132: warning: Function parameter or member 'listener' not described in 'sclp_sd_listener_init'
  drivers/s390/char/sclp_sd.c:408: warning: Function parameter or member 'cookie' not described in 'sclp_sd_file_update_async'
  drivers/s390/char/sclp_sd.c:422: warning: Function parameter or member 'attr' not described in 'reload_store'
  drivers/s390/char/sclp_sd.c:422: warning: Function parameter or member 'buf' not described in 'reload_store'
  drivers/s390/char/sclp_sd.c:422: warning: Function parameter or member 'count' not described in 'reload_store'
  drivers/s390/char/sclp_sd.c:457: warning: Function parameter or member 'file' not described in 'data_read'
  drivers/s390/char/sclp_sd.c:457: warning: Function parameter or member 'attr' not described in 'data_read'

Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

drivers/s390/char/sclp_sd.c

@@ -122,6 +122,7 @@ static void sclp_sd_listener_remove(struct sclp_sd_listener *listener)
 
 /**
  * sclp_sd_listener_init() - Initialize a Store Data response listener
+ * @listener: Response listener to initialize
  * @id: Event ID to listen for
  *
  * Initialize a listener for asynchronous Store Data responses. This listener
@@ -403,6 +404,7 @@ static int sclp_sd_file_update(struct sclp_sd_file *sd_file)
 /**
  * sclp_sd_file_update_async() - Wrapper for asynchronous update call
  * @data: Object to update
+ * @cookie: Unused
  */
 static void sclp_sd_file_update_async(void *data, async_cookie_t cookie)
 {
@@ -414,6 +416,9 @@ static void sclp_sd_file_update_async(void *data, async_cookie_t cookie)
 /**
  * reload_store() - Store function for "reload" sysfs attribute
  * @kobj: Kobject of sclp_sd_file object
+ * @attr: Reload attribute
+ * @buf: Data written to sysfs attribute
+ * @count: Count of bytes written
  *
  * Initiate a reload of the data associated with an sclp_sd_file object.
  */
@@ -441,8 +446,10 @@ static struct kobj_type sclp_sd_file_ktype = {
 };
 
 /**
- * data_read() - Read function for "read" sysfs attribute
+ * data_read() - Read function for "data" sysfs attribute
+ * @file: Open file pointer
  * @kobj: Kobject of sclp_sd_file object
+ * @attr: Data attribute
  * @buffer: Target buffer
  * @off: Requested file offset
  * @size: Requested number of bytes