Adding parameter descriptions to the _scsih_set_debug_level.

Signed-off-by: Deming Wang <wangdeming@inspur.com>
---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 89ef43a5ef86..7b6733aa6174 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -302,8 +302,9 @@ struct _scsi_io_transfer {
 
 /**
  * _scsih_set_debug_level - global setting of ioc->logging_level.
- * @val: ?
- * @kp: ?
+ * @val: the value of the parameter to be set
+ * @kp: a pointer to the kernel_param structure, containing information
+ *      such as the parameter's name, type, and permissions
  *
  * Note: The logging levels are defined in mpt3sas_debug.h.
  */
-- 
2.31.1